Ford PowerStroke Diesel

PowerStroke Diesel - red crew cab

Ford POWERSTROKE Diesel Owners

AMSOIL offers superior lubrication AND filtration technology for your PowerStroke Diesel engine, as well as superior synthetic lubricant solutions for all your other drivetrain fluids.  This extensive owner’s page will help you learn how to provide the best care for the PowerStroke in all its’ versions, including the options for fluid and oil change service intervals, AND learning what FORD and most servicing dealerships don’t want you to know about the world-class AMSOIL synthetic motor oil and nanofiber filtration technologies.

We cover maintenance essentials and insider secrets for PowerStroke turbo-diesel truck, including the 6.9L, 7.3L IDI, 7.3L DI (HEUI), 6.0L (HEUI), 6.4L and 6.7L PowerStrokes, including:  options for fluid and oil change service intervals including bypass oil filters; getting extremely long-life like-new performance from your PowerStroke’s turbocharger;  and, how to avoid nearly all transmission and differential failures.  Experienced OEM Truck Engineers and Lubrication Specialists, based out of the auto and truck engineering and manufacturing capital of the world in Detroit, Michigan, have combined their knowledge to explain valuable secrets for every PowerStroke owner.

Click to Review Maintenance Products and info for your PowerStroke






Jump below to:

Which Diesel Oil Should I Use?

How to Prevent Diesel Turbo Failure

Here’s a proven way to
Boost fuel economy by an average 6.5%

Rear Differential with upgraded aluminum cover - click here for how to avoid differential failures

Engineering Bonus:  Here’s how to prevent diff failure.  Why your truck differential should last at least 500k miles, but won’t unless you apply the two simple maintenance secrets. 


  1. PowerStroke Engine oil options – both a Detailed Oil Review, and a summarized Engine Oil Selection Chart
  2. PowerStroke Recommendations and options for bypass oil filtration systems.
  3. Video showing how easy it is to take an oil sample from your engine for analysis testing.
  4. Why don’t OEM’s, Quick-lubes and Oil Companies promote synthetics?
  5. How to Prevent PowerStroke Turbo Failure
  6. Special PowerStroke Owners Questions and Answers section, where our engineers welcome your PowerStroke questions and give valuable, authoritative answers. (The Q&A even explains how to eliminate rough starting and idling from “stiction” petro-gluing in 7.3L HEUI and 6.0L HEUI injector units, comparing Archoil to AMSOIL.)

You’ve probably heard the rumor, and it’s true.  Since the first challenge, nearly all the top DieselPower Challenge competitors have used AMSOIL lubricants.  That is no coincidence: there are big technology advantages behind it, and we’re going to let you in on the secrets.  We are Powerstroke Diesel engine, powertrain and chassis experts and are here to help you achieve optimum performance and longevity from your truck.

You Bought a PowerStroke!

You’ve spent your hard earned money on the PowerStroke TurboDiesel engine option, in one of the most well engineered trucks on the planet.  Now don’t you owe it to yourself to use the very best oil in it to maximize its life, towing performance and fuel economy?  Secret: Your PowerStroke’s turbocharger needs a good synthetic oil for long life!  Petroleum oils CANNOT do that job as well.  In addition, you need high-performance synthetics throughout your engine and drivetrain to maximize your PowerStroke’s fuel economy, and to enable you to tow confidently, without the pains of transmission or differential failures.

What should your diesel oil drain interval be?  That depends completely on the performance and condition of your PowerStroke’s oil and filtration, which is something you can control.  As the global gold-standard for synthetic lubrication performance, AMSOIL offers superior lubrication AND filtration technology for your PowerStroke Turbo-Diesel engine, as well as superior synthetic lubricant solutions for all your other drivetrain fluids.  (For a deeper explanation of why we recommend AMSOIL-engineered diesel motor oils for the PowerStroke turbodiesel, beyond the info below, see how to pick the best motor oil.)


Don’t let your local dealership service center tell you that you you have to use their brand of oil to “maintain your warranty”.  That is one of the biggest untruths we have heard, yet it goes on day in and day out.  We constantly receive calls from customers that were told this by their servicing dealership. Please be aware that this practice is not authorized or condoned by Ford or the other auto manufacturers.

For a servicing dealership to essentially tell a customer that they have to use a lower quality oil to “maintain their warranty” is not only wrong but it is also illegal unless they provide it free of charge. There are Federal laws that protect you against this. Please read “Vehicle Warranties Wtih AMSOIL” to learn more.

Here’s the bottom line: use of AMSOIL’s REAL SYNTHETIC lubricants throughout the drivetrains of commercial diesel fleets has been shown in field studies to net an average fuel economy improvement of 6.54 to 8.2%.  Fleet conversions to AMSOIL have proven that reliability goes way up, along with fleet service life, while maintenance costs go down significantly – often cut in half.

Jump below to:    How to Get Long Turbocharger Life in the PowerStroke

This new pdf Diesel Power brochure covers important products and information on diesel-powered vehicles like Ford’s PowerStroke F-series trucks.

If you want to buy AMSOIL Products, you can visit our vehicle maintenance page, or the AMSOIL On-Line Store or download a clickable pdf e-catalog

Synthetic Engine Oils Specifically for the PowerStroke Diesel

(This section has detailed explanations. For a simple PowerStroke engine oil summary, see section below: which oil should I use?)

AMSOIL is devoted to protection

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For the PowerStroke Diesel, AMSOIL engineered and manufactures three fuel-efficient synthetic turbodiesel engine oils.  The options split along the model years due to emissions equipment, with 2007 being the wavy dividing line:  early 2007 models follow previous model years because the 6.0L PowerStrokes fortunately lack the Diesel Particulate Filters (DPF’s), and so use “SAE CI-4+” Service Grade oils.

So for 1982-1987 6.9L, 1988-1993 7.3L IDI, 1994 to 2003 7.3L DI (HEUI) and 2003-2007 6.0L (HEUI) PowerStroke renditions, all three available oils can be used because CJ-4 oils are backwards compatible.  And all three oils will prevent temperamental HEUI problems of rough cold-running – an injector function problem caused by petroleum oil sludge and varnish deposits.  (See question below on how to eliminate existing rough cold starting/idling.) However, the ideal oil is the legendary AMSOIL 15W-40 Premium Heavy Duty Diesel & Marine oil (AME), which powers many of North America’s semi fleets and has been the go-to brute for Diesel Power Challenge contenders, and has the full advantages of high ZDDP and TBN: this oil is the best-performing choice for all 1982-2007 PowerStroke versions, and delivers the lowest wear-rates and 25,000 mile drain intervals.  This has been firmly established by extensive oil analysis testing and hundreds of millions of fleet miles.

In fact, if you use oil analysis you can usually go much longer than 25,000 miles on the oil in a year’s time.  Dipstick checks should always consider any abnormal appearance to the oil, since it can reveal intrusion of coolant or fuel into the oil. Any unusual appearance should be immediately evaluated by a diesel mechanic and/or oil analysis, in order to avoid or minimize engine damage from conditions such as injector or head-gasket failures.

The 2007 to 2010 years which have the 6.4L PowerStroke model, and the 2011 to current 6.7L PowerStroke’s are all equipped with DPF exhausts and use cylinder over-fueling for the active regeneration cycle.  In order to extend the service intervals of cleaning the DPF filters, the SAE introduced the CJ-4 formulation requirements for engine oils which restricted the important Sulfated Ash and Phosphorus (SAPs) additives and created new formulation/performance challenges for the industry.  The AMSOIL Premium 15W-40 Synthetic Diesel Oil (DME)  and the AMSOIL Synthetic 15W40 OE Diesel Oil (OED) both deliver superior performance that far exceeds the CJ-4 specification for the new 2007+ PowerStroke engines with DPF’s.
 Which Diesel Engine Oil Should I Use?

The first oil (DME) delivers maximum global performance and  protection achievable under SAE CJ-4, together with longer service life.  The second oil (OED) is intended for use at Ford’s recommended drain interval, and is formulated with the lower API-marketed formulation restrictions including ZDDP, to equal or outperform any competitive API-Licensed oil on the market.  However, its’ drain interval cannot be extended beyond Ford’s recommendations.  When used in conjunction with the AMSOIL Ea nanofiber engine oil filtersthe first oil (DME) will deliver lower wear rates and allow you to use oil analysis to extend the oil and filter change interval, and could deliver up to 1 year or 25,000 miles between oil and filter changes, depending on model year, fuel and driving conditions. Otherwise, both of these CJ-4 oils are recommended for use at the longest Ford oil-drain interval in the manual.  Due to the lower TBN of the low ash CJ-4 formulation, and the driving-habit variability of potential fuel contamination of the oil due to active DPF regeneration cycles, longer drain intervals WILL require oil analysis sampling.

For more information on this, look up your model and see what statements have been provided at the beginning of the information.  For example, when looking up the 2010 F350 with 6.4L PowerStroke Diesel, you will notice this statement in red which also appears for all 2007 PowerStrokes to current 2016 models:

AMSOIL has identified high fuel dilution in most 2007
and newer light-duty diesel pickup trucks, including this one.
When fuel infiltrates the oil sump, oil life is shortened.
Therefore, AMSOIL diesel oils used in this vehicle must be changed according to the manufacturer’s recommendation.
Oil drains can be extended further only when using oil analysis.

Look up your PowerStroke maintenance details






Other AMSOIL benefits include reduced sludge and deposit formation, extreme temperature protection, improved fuel efficiency and rust and corrosion prevention – and of course it does not void any new vehicle warranty. AMSOIL Synthetic Lubricants meet and exceed all API rated and Ford Specifications. In fact, these lubricants are so advanced that historically they’ve typically already met/exceeded nearly every OEM manufacturer’s NEW published diesel oil test standard, worldwide, without any reformulation.

Q:  Which PowerStroke engine model years allow the longest drain intervals with AMSOIL’s premium synthetic AME or DME 15W-40 diesel oils?

A:   That is an excellent question for owners considering the purchase of a PowerStroke.  In essence, this question relates to two factors: the use of biodiesel, and the regeneration cycle approach of DPF-equipped PowerStroke vehicles – which began in 2007.  These two issues combine in a cumulative way.  Any frequent use of fuel with a B5 (5%) or higher biodiesel component should be considered as mandating oil sampling analysis to extend oil drains out to 20,000 miles or beyond.  B2 is not typically a noteworthy factor in any except the 6.4 and 6.7L  (2007 to 2016), where it probably does play a small role in further reducing oil life beyond the glaring problem of fuel-contamination of the oil.

The earlier PowerStrokes all have an advantage in this question, because none of them (through to early 2007 models with 6.0L) have DPF’s.  As long as there is no head-gasket or injector leak present (mechanical problems which contaminate the oil), these engines allow AMSOIL AME to deliver 25,000 mile / 1-year oil and nanofiber AMSOIL oil filter changes. Likewise, installation of an AMSOIL Dual Remote Bypass Filter kit (such as the BMK-26 bypass filter for the 7.3L) enables these engines to avoid oil changes by combining filter changes with oil sampling analysis.
AMSOIL provides 75% Better Protection 400x300_75ASL

The 2007 6.4 to the present 2016 6.7L are unfortunately the worst, most risky odds for being able to extend drain intervals beyond the Ford recommendations. This is because the regeneration cycle for the DPF burns out the filter’s accumulation by over-fueling the cylinders (after burn completion) to put diesel fuel into the exhaust, which washes fuel down the cylinder walls into the oil.

This is because the ACTIVE (not passive) regeneration cycle for the DPF burns out the filter’s accumulation by over-fueling the cylinders (after burn completion) to put diesel fuel into the exhaust, which has the piston rings unavoidably wipe unburned fuel down the cylinder walls into the oil.  Due perhaps to unique details of the 6.7L engine design, Ford has not transitioned to the superior 2011+ DPF regeneration-cycle approach used by GM to avoid fuel contamination of the oil (see below) by use of a fuel injector in the turbo down-pipe.

“Passive” regeneration occurs during normal operation, due to high enough throttle & fuel-burn rates to take the internal DPF temperature above the ~1100°F threshold where the captured diesel fuel particles will be ignited and burned.  Active regeneration of the DPF occurs when the exhaust back-pressure builds (diesel particulate matter, DPM, has accumulated enough to obstruct exhaust flow). To force a DPF burnout,  the engine computer sprays fuel into the cylinders at the end of combustion so that the unburned fuel is exhausted into the high-temperature exhaust, raising the DPF temperature high enough to get burnout of the DPM buildup.

Because of the variable of Active Regeneration of the DPF, how the vehicle is used becomes a critical factor in oil contamination:

  1. Owners – Managers: Click Here to APPLY FOR AN AMSOIL COMMERCIAL ACCOUNT. Fleet – Facility – Equipment. Get the Best Pricing PLUS Expert Engineering Advice Unfortunately, PowerStroke “daily driver” 6.4L and 6.7L commuter pickups in city driving are almost certain to experience a high frequency of active regeneration.  [If a truck will be used in that way and you need to purchase a 2007+ model year, you should instead consider purchasing a 2011+ Duramax-powered vehicle, because the LML engine model changed the active regen approach by adding the Hydrocarbon Injector (HCI), which is simply a 9th fuel injector that sprays fuel directly into the turbo exhaust down-pipe, eliminating the need to over-fuel the cylinders post-combustion.  So the HCI now injects all the diesel fuel directly into the exhaust stream during active regeneration (cleaning of the diesel particulate filter).  This active regeneration strategy is unique to the LML, and will be used for the foreseeable future.]
  2. “Foreman” PowerStroke trucks are quite likely to experience active regeneration cycles, which can vary from occasional to frequent. Idling and low speeds with light loads will ensure a-regen. In this application, approach extended drain intervals with caution.
  3. Some fleet and “working” PowerStroke vehicles will experience little or no problem with this fuel contamination of the oil, because they are rarely in active regeneration: these are vehicles which are always adequately loaded and frequently driven in highway traffic with medium to high throttle long enough for the passive regeneration to keep the fuel particulates burned out of the DPF canister.  Caution: OTR drivers must always rely on APU’s for stationary power, rather than idling the truck engine during lunch/dinner/sleeping.

So, the speed and severity of engine-oil fuel-dilution in these PowerStrokes is largely driven by driving habits.  To clarify, a truck which is frequently well-loaded or hauling for 20+ miles at a time in warm to moderate temperatures is likely to put the DPF in the temperature range to burn out the accumulated fuel particles, so oil sampling analysis will probably show that extended drain intervals are possible with AMSOIL’s DME.  But a PowerStroke which is a daily driver in the upper mid-west with a 10 mile commute, that seasonally pulls a trailer once or twice a month, is going to do most of its’ DPF burnout regenerative cycle by over-fueling of the cylinders after firing. In this case, while AMSOIL will provide superior protection and performance, drain intervals are restricted by fuel contamination and cannot be significantly extended – and this is where the cost-effectiveness of the AMSOIL OED makes a lot of sense.

So DPF-equipped “working” fleet PowerStrokes can likely deliver extended drain intervals with DME, particularly by adding an AMSOIL Dual Remote Bypass Filter kit.  This is because a bypass filter kit lowers oil-sump temperature, reduces the load on the additive package, and adds about two more quarts of oil capacity.

As a final thought for mixed DPF/non-DPF fleets, keep in mind that AME will provide lower wear rates than DME: this is reflected by the difference in the 4-ball wear test scar sizes of 0.35 mm and 0.51 mm respectively.

Q:  What can you expect when changing your PowerStroke to
AMSOIL’s superior synthetic diesel oil?

A:  One change is oil pressure.  My 2002 turbo-diesel always idled at about 40 psi oil pressure when warm, and pegged somewhere over 80 psi when first started up.  After the engine flush procedure and change to AMSOIL’s 15W-40 (the same viscosity it always had), dash oil-gage pressure immediately dropped to about 28 psi warm idle, and about 60-80 psi cold.  That type of change is also fairly typical with 15W-40 AMSOIL in many PowerStroke diesels.  Some people might be alarmed by this lower oil pressure, but actually it’s a GREAT sign: it means that more oil is flowing through a cleaner engine – for better lubrication, better wear protection, better engine cooling – and that it’s taking less power (fuel) to pump the oil.

Another change is dramatically lower wear rates, and extended oil drain intervals – even with HEUI engines.  Follow me on this for a minute…  AMSOIL technology produced a Million Mile 5.7L gas-engine 3500 van with the original untouched engine and transmission.  No joke. So imagine what we can do for your PowerStroke diesel… but wait!  You don’t have to imagine much:

A grueling-duty diesel fleet tested a switch to AMSOIL.  Read the stunning results revealed by their existing PM program oil analysis testing, and the remarkable results of a standard 8,000 hour maintenance teardown on the HEUI DT466 engine, after running an AMSOIL diet of over 900 hour oil changes including cold Wisconsin winter starts. (It previously required 200 hour drain intervals using Rotella T6.)

The Secret Power of Nanofiber Bypass Filtration

BMK27 AMSOIL Dual Remote Bypass Filter Mount for the Duramax
The BK309 Dual Bypass Filter Mount holds two super-sized filters

^Up to Page Index

The ULTIMATE option for lowest maintenance costs and downtime is to install an AMSOIL Dual Remote By-Pass Filtration System. This is the highest performance bypass oil filter in the world for light to heavy vehicle applications, and yet it’s also among the lowest cost.  The specific kit for the 7.3L PowerStroke is the AMSOIL BMK-26 Dual Remote Bypass Filter kit, and for the 6.7L the AMSOIL BMK-28 Dual Remote Bypass Filter Kit. The bypass filtration systems extend the life of the engine oil in three ways: by adding 1-micron filtration, adding about two more quarts of oil capacity, and adding additional passive cooling for the oil.  With this nanofiber technology system you eliminate over 90% of engine wear, and only change your oil when oil analysis indicates a need.  The full flow EaO filter is changed at 15,000 mile (severe service) or 25,000 mile (normal service) intervals and the EaBP Bypass filter is changed at a minimum of 60,000 miles/2 yrs.  At under $500 cost, these complete systems quickly pay for themselves.

I have over 70,000 miles on the oil change in my diesel Duramax truck [using the AMSOIL Dual Remote Bypass system, which I installed in a few hours with a GM headquarters engineer when we also installed a system on his 2005 Silverado Duramax toy & RV-hauler], and I do oil sampling analysis.  Look here at one of my 6.6L Duramax oil sample reports and you’ll see that I have no TBN or viscosity problem, and wear rates are very low.  And fact is, I probably will never have a problem, even though I’m changing only my oil filters – not my oil.  If I did this on my Duramax, you can do this on your PowerStroke: thousands of PowerStrokes use AMSOIL’s bypass filtration systems.  

In this video I used my own turbo-diesel truck to show you how easy it is to pull an engine oil sample for analysis:

See this video on YouTube

Oil analysis is also valuable without bypass filtration.  When using AMSOIL nanofiber Ea Air and Oil filters, analysis will usually allow extending AMSOIL drain intervals far beyond the guaranteed 15,000 (Severe) or 25,000 mile (Normal Service) drain intervals on non-DPF or on 2011+ LML engines.

Safely Extend Oil Drain Intervals With Zero Warranty Issues:  Download our Free Guide to Oil Analysis Sampling

Need an Oil Analysis Kit or sampling pump?   Visit our Oil Analysis Store

For most gas or pre-2007 diesel vehicle applications using AMSOIL synthetics and nanofiber bypass filtration, oil analysis will show that you NEVER need to change your oil again – even after 500,000 miles!  The bypass system will also extend the oil change interval of “working” 2007+ trucks which are regularly used for hauling/towing and normally spend their running time at moderate to high throttle, because most DPF fuel-particulate burnout will occur without a regeneration cycle.Click to Review Maintenance Products and info for your PowerStroke

How is this possible???  By using highly engineered synthetic oil that is designed to retain its properties and not break down, and using nanofiber filtration that removes all wear particles, (and not over-fueling cylinders so the oil gets contaminated) there is no longer a need to change oil.  The oil is so tough that just topping off the oil level when changing filters is enough to renew the additive package.  This saves a lot of downtime, as well as money, and uses 80-90% less motor oil – which benefits both your wallet and the environment.

The AMSOIL 15W-40 Premium Heavy Duty Diesel & Marine oil and AMSOIL Premium 15W-40 Synthetic Diesel Oil (DME) do not break down like conventional petroleum based motor oils, are much more shear-stable and do not have the waxes, paraffins and by-products that come out of crude oil that is pumped from the earth.AMSOIL Bypass Filter installation on HEUI 6.0L PowerStroke

The by-pass filter removes the particles that cause wear in your engine down to less than one micron (a micron equals 0.001 mm) and keeps the engine oil analytically clean so you do not need to change your oil for a long time, while still getting far better protection than someone that changes their oil every 3000 miles. We are experienced at installing these units on Powerstroke Diesels and can provide you with exact installation instructions, tips, bracket prints and photographs of a truck installation. Here is one example of a bypass installation on a 2006 F350 PowerStroke.

One of the Power Stroke Diesels in our dealer group had over 84,000 miles on the same oil as of November 2003. Laboratory oil chemical analysis every 15-20,000 miles indicates the oil is perfectly suitable for continued service. Other customers have traveled well over 100,000 miles and oil analysis still indicates no oil change necessary.   My personal Duramax 2500HD CC/SB/4×4 has the bypass system and has traveled 77,000 miles with only filter changes, as of April 2008. Here’s one of my 6.6L Duramax oil sample analysis reports, so you can see the data for yourself.

BMK-27 Installation on 2002 GMC 2500HD Duramax
AMSOIL Dual-Remote Bypass Filter

Which Oil Should I Use?

Oil analysis provides a big return for your small investment: by extending equipment life; by preventing premature component failure; reducing maintenance costs by eliminating unnecessary component changes; decreasing downtime due to premature scheduled maintenance; enabling calculation of optimum drain intervals that reduce lubricant costs and assure maximum equipment protection.

A normal full-flow filter simply cannot remove all the finer particles because the oil must be filtered quickly while removing most of the particles present in the oil.  That leaves some particles below the 20 micron range. A study completed by Federal Mogul Corp. analyzing over 7000 main and connecting rod bearings concluded that 60% of all engine wear occurs in the 5-20 micron range. This is why no matter how much you change your current full flow oil and filter, regardless of brand, that you still are not removing all the particles that cause the greatest wear in your engine.How to Prevent Turbo Failure

A regular full flow engine oil filter will only remove wear particles down to the 20-25 micron range, while an AMSOIL full-flow Ea nanofiber filter removes the majority of particles in the 7-20 micron range. Extensive testing shows that AMSOIL Ea Oil Filters achieve a near-perfect absolute efficiency rating. The exclusive new technology used in AMSOIL EaO Filters provides PowerStroke filtering efficiency of 98.7 percent at 16 microns, and 50 percent at 7 microns. That’s much better performance than Ford’s OEM filter.  No surprise: because of their nanofiber media, EaO Filters are the most efficient full-flow filters that are available for auto/light trucks, period.

Q: How do EaO filters compare to the full-flow SDF filters that AMSOIL offered for many years?
A: AMSOIL SDF Filters are not quite as efficient as an EaO: filtering efficiency was 94.3 percent at 15 microns and 51.2 percent at 7 microns. The AMSOIL SDF full flow filters had a finer synthetic cellulose filtration media, 75% greater efficiency and up to 300% greater capacity than other popular oil filters, as tested according to the Society of Automotive Engineers (SAE) HS806 test method. The new Ea filters, with nanofiber technology, are even better.

Now, back to considering the nanofiber bypass filters, which are used in addition to a full-flow nanofiber filter.  AMSOIL EaBP Filters are high efficiency bypass filters with 98.7% efficiency at two microns. They also remove soot, providing the ultimate in protection against wear, oil degradation and corrosion: your diesel’s dipstick will show remarkably clean oil, darker than from a gasoline engine but not at all jet-black like typical diesel oil.  Most importantly, you virtually eliminate engine wear, because all the wear particles are filtered out of the oil.

Nanofiber AMSOIL Bypass Filter Options
In Center above, the BMK-26 / BMK-28 Dual Remote Bypass Filter for 7.3 and 6.7 PowerStrokes

A complete AMSOIL Dual Remote By-Pass Filtration System kit costs under $500, so it is a very cost-effective improvement that will pay for itself quickly on 2006 and prior PowerStrokes, and on 2007+ “working” trucks.  NOTE: While it is a very beneficial system which directly reduces engine wear rates, it does not generate a quick cost-effective payback on unloaded “daily driver” 2007+ trucks that are not putting on at least 20 highway miles for each leg of a trip: short trips with small loads only create low heat levels in the DPF, so that frequent regeneration and rapid fuel-contamination in the oil will only allow a small extension of the drain interval.  Even if you do not choose to install the Dual Remote by-pass filtration system, the AMSOIL EaO full-flow nanofiber engine filter provides a 70% wear-rate reduction which is a significant benefit to the long term durability of your engine, as well as allowing for up to 1 year or 25,000 miles of service on the filter.

When you check your oil level every 5,000 miles or 3 months, all you have to do is check the oil level and top it off – don’t drain it or change the filter. When you reach 25,000 miles/1-year on a non-DPF PowerStroke, you can either change the oil and filter or take an oil sample from the dipstick tube using an AMSOIL sampling pump and send it into Oil Analyzer’s Inc using a pre-paid kit.  DPF-equipped PowerStrokes should use oil sampling every 5,000 miles until the proper oil/filter change interval can be determined based on fuel dilution of the oil.  Afterward, oil sampling is recommended at filter-change and at oil-drain intervals, but at more frequent intervals if driving/load conditions change substantially.  Oil analysis will indicate the exact condition of the oil and whether it is suitable for continued service as well as determining if there are any other engine components or wear items that you need to be concerned with.

For top-quality oil analysis sample kits, tools, and vehicle data trending, Visit our Oil Analysis Store

AMSOIL has a complete line of synthetic oils, greases, transmission fluids, gear lubes, Ea nanofiber air filtersby-pass and full flow filters and bypass filtration systems designed to extend the life of your vehicles and equipment and save you time and money. In addition, for purchasing products at wholesale cost, we also offer a Preferred Customer purchase option, retail sales purchase option or commercial account purchase option for businesses. Finally, we also offer a Dealership Option for anyone interested in becoming an AMSOIL Dealer.


Why don’t OEM’s, Quick-lubes and Oil Companies promote synthetics?

That’s an excellent question that gets dodged or concealed every day. We expose the truth, explaining how the petroleum industry, quick lubes, dealership oil service centers and auto parts stores work to get your money on a regular basis.  OEM’s count on most vehicles leaving service after about 200-300k miles, and to lengthen that life would impact their profits substantially.  It’s the same profit-motive in the oil-change industry.

In a Lubricants World MagazineThe target is your money interview the president of Jiffy Lube International (owned by Penzoil- Quaker State), Marc Graham states that if they can get customers to shorten their drain intervals by 100 miles it would mean an additional $20 million in revenue for the company per year and if they can get consumers to do one more oil change per year it would mean $294 million for the oil change alone and $441 million in revenue when they include ancillary products and services that go along with the oil change. In fact, Graham openly admits that the bottom line is profits. The shorter the drain interval the more money Jiffy Lube and Penzoil-Quaker State make. With statements like this, where is their care about your vehicle and selling you a quality extended drain interval synthetic, like AMSOIL? All they want is to see the same customer over and over again as often as possible!

Current recommended practice is to change your oil every 3000 miles with petroleum based oil as well as with many other brands of synthetic oils. This is completely unnecessary with the AMSOIL technology that is available today, and has been available since 1972. AMSOIL extended drain interval synthetic oil causes lost profits in standard quick lube oil changes and other service work. Several dealerships we have visited stated that they like to keep customers coming in every 3000 miles so they can look the vehicle over and find other components that they can service.

The 3000 mile oil change, in this day and age of high-performance synthetics, is in our opinion one of the biggest scams on the American public ever. Many of the same companies that continue to recommend the “3000 mile oil change” in the U.S. currently manufacture and/or recommend, and have for many years, 12,000-18,000 mile synthetic oil changes in Europe! In fact Europe’s goal is to reach 30,000 mile oil change intervals in the near future. That is a proven fact that they don’t want you to know.

The 3000 mile oil change is, in our automotive engineering opinion, a big money generator for all parties involved with it. They want to sell oil, as well as possibly find other things to repair, and they want to ensurePay again and again for oil changes you come back on a regular basis. What better way is there to do that than with the ” 3000 mile oil change”. You pay on a regular basis and are constantly keeping track of when the next oil change is required, especially if you log a lot of miles. “3000 mile oil” will provide average performance and longevity of your engine’s design and that is about it. Over a period of time, internal sludge and varnish build up from petroleum oil can possibly start causing problems, namely piston ring groove and valve sticking as some of the top issues that have been identified. And in HEUI diesel engines, these petroleum deposits will produce rough cold-weather starting and idling.  If you change it yourself, you can save some money but you still have your time involved plus all the waste oil to dispose of.

The people that run the quick lubes and service centers are there to make profits by seeing you on a regular basis and do not care about extending your vehicles life. We know this because we have tried to get some of the quick lubes and dealership service centers to carry AMSOIL extended drain interval gas engine oil (25,000 miles/1-year and 35,000 miles/1-year with the 0W-30) and get the standard response that they know it is an excellent product but if they install it they cannot keep customers coming back as often. AMSOIL then tailored special top quality standard-drain and reduced mileage extended drain interval oils (called the OE and XL lines) for the quick lubes to offer 7,000 – 10,000 mile drain intervals so they can keep customers coming back but still give them added convenience of extended drains intervals. This has proven to be an excellent program for all involved.

In addition, many companies have tested AMSOIL and know how good it is, and many auto engineers even use it in their own vehicles.  We believe they will not use it in production for “political reasons”. It is our opinion that oil companies need to sell large volumes of oil, and auto companies want your engine and powertrain to have somewhat of a finite life. Enough life so that you are a satisfied and happy customer who will come back and buy another one, yet not so long that you won’t need to buy another vehicle. Petroleum oil seems to accomplish both objectives perfectly.  AMSOIL has been proven for over 40 years to prevent your power-train from slowly dying.

I have an article about an AMSOIL user with 731,000 miles on his 1993 Ford Aerostar on the original engine and transmission. He was using AMSOIL from the beginning. This type of mileage is not uncommon when using AMSOIL synthetic lubricants. Now, what do you think would happen it everybody used AMSOIL and got that much mileage on their vehicles? The auto companies like to hear reports of stuff like this on a small-time basis but not on a large scale as it would have major negative economic implications.

Newer Amsoil synthetic oil and filter technology have recently enabled the “million mile van” using 25,000 mile synthetic oil and nanofiber filter changes, and 150,000 mile transmission and differential synthetic fluid changes.  Just think of how much money was saved by not replacing that commercial van every 200,000 miles, and never having transmission repairs!

Few people who are in business to sell petroleum oil and repair vehicles are going to tell you how to extend your drain intervals using AMSOIL technology.  And they know very little, if anything, about the technical and engineering aspects of lubrication, filtration and oil analysis science.

We are here with facts to show you how using AMSOIL gives you a superior product, and increases the performance and longevity of your Ford Powerstroke Diesel while saving you time and money. The Powerstroke Diesel is an excellent vehicle and exceptionally well engineered by Ford Motor Company International. In our opinion it is one of the best trucks ever produced. However, there are ways to make the performance and longevity even better with AMSOIL Synthetic Lubricants.


How to Reduce or Prevent Turbocharger Bearing Seizures on PowerStroke Turbo-Diesels

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One of the many specific areas where PowerStroke engines can clearly benefit from the use of synthetic oil is the turbocharger.  When a turbocharged engine is shut off immediately after use, bearing “heat soak” occurs due to the heat that naturally flows out of the hot exhaust manifold and into the turbo, adding to the high temperatures still present in the turbocharger: all this heat “soaks” into the bearings which are no longer being cooled by a flow of engine oil.  Over a period of time this can lead to deposits that can reduce or block the oil flow to the turbocharger bearings, which can lead to turbocharger bearing seizure.Save up to 25 percent and get exclusive offers as an AMSOIL Preferred Customer PLUS exclusive help from a former OEM headquarters senior engineer

The hotter the outside temperature and the heavier your load, the more heat is being stored in the engine and exhaust: thus, this is the greatest risk to your turbocharger’s life from post-shut-off “heat soak”.

To combat these problems and give your turbo maximum life, our engineering staff recommend two things: 1) one of AMSOIL’s Synthetic Diesel Oils, and 2) use of a turbo cool-down timer.  A cool-down timer gives your engine a chance to lower the EGT (Exhaust Gas Temperature) to a safer level before the engine shuts off.  A true synthetic oil does not break down and form deposits in the same temperature range as petroleum (“mineral”) oils.  Of these two, the most important is to make sure your Duramax engine oil is a high-quality true synthetic.

AMSOIL’s Synthetic Diesel Oils are inherently far more thermally stable than most diesel oils on the market, and have been shown to keep turbochargers considerably cleaner than other brands of oil. In fact, AMSOIL synthetics have a noted historical reputation for maintaining turbochargers in a clean like-new condition.  Meanwhile, poor quality engine oils have been shown to cause turbocharger bearing seizure in under 100 hours during a “heat soak” test.

Many other engine oils will survive the 100 hour “heat soak” test, but… with considerable deposits and incipient oil passage blocking.  So what oil you select for your PowerStroke diesel is vital for long turbo life.  If you use typical petroleum name-brand or low-quality diesel oils, it is critical that you let the engine idle for 1 to 20 minutes after use (depending on load, air temperature and driving conditions), to allow the engine and turbocharger to cool. This “cool-down” period does not eliminate deposit formation when using petroleum diesel oils, but it can dramatically reduce it.

The bottom line: To prevent or eliminate turbocharger bearing seizure, there is no substitute for a high quality synthetic diesel oil (like AMSOIL’s) as they have been proven to maintain turbochargers in an almost “as fitted” condition, and significantly reduce deposit formation.  Take a look at the varnish deposits in this picture below, which are the results of a severe high temperature deposit test with some of the most trusted commercial brands. This test clearly shows that AMSOIL keeps engines cleaner longer than other major brands of diesel oils. Which oil would you rather have protecting your PowerStroke engine?

We are here to help you learn the facts and to show you how using superior AMSOIL products will increase the performance and add to the longevity of your PowerStroke Diesel, while saving you time and money. PowerStroke Diesel trucks are excellent vehicles and exceptionally well engineered by Ford.  In our opinion, they are one of the most advanced vehicles ever produced.  However there are ways to make the performance and longevity even better with AMSOIL Synthetic Lubricants.

Skeptical? No problem:

Read our Q&A with hardcore “scamsoil skeptics”

Long engine life:  Many people believe that getting 200-300,000 miles on a gas engine is proof of a “good oil”, but that’s nothing. In reality nearly any oil can do that due to modern engine designs.  We have an article describing an AMSOIL user with 731,000 miles on his 1993 Ford Aerostar, on the original engine and transmission. He was using AMSOIL from the beginning.  This type of mileage performance is unheard of in basic passenger vehicles with conventional petroleum oils, but is not uncommon when using AMSOIL synthetic lubricants.  Newer AMSOIL synthetic oil and filter technology have recently enabled the “million mile van which is still running strong.   How much money was saved by not replacing those vans every 200,000 to 400,000 miles?

I also met a PowerStroke owner who was on his third truck.  He and his wife are retired and tow a 5th-wheel around the U.S. and up into Canada as well.  He says he has his “system” down pat: he outfits his truck with an in-bed auxilliary fuel tank, high-flow exhaust and air intake, all Amsoil synthetics throughout the drivetrain, and the Amsoil Dual-Remote Bypass filtration system to filter the engine oil.  “Then”, he said, “of course I never change the oil – just the filters.  I put 500,000 miles on the truck, then sell it and buy a new one.  The people I sell them to get excited, talking about how they drive like they have 50,000 miles on them, and asking about the bypass filter.  I show them my oil sampling reports, and of course, they show the oil is perfectly good and very little engine wear is occurring.  I get a kick out of visiting them every year or so, just to see how they’re doing.  The last truck I sold to a farmer, who uses it to haul all his trailers and wagons.  He got excited when he saw me, and said yeh, he still can’t believe it.  He just changes the filters like I showed him, and it still runs fabulous.”

Improved PowerStroke fuel economy savings:

While most customers will only get a 5 to 10% fuel economy improvement (my diesel truck gained 8%, my car mpg improved 10%), gains of 20% are not uncommon.  Phillip is a customer with a 1999 Oldsmobile Silhouette van who had changed his motor oil at 3,000 mile intervals.  In the spring of 2005 when he used Engine Flush and changed to AMSOIL engine oil with about 85,000 miles on the odometer, he got an instant 20% fuel economy increase which has been saving him about $12 per week.  That annual savings of more than $600 is six times more than the $100 annual cost of the AMSOIL products.

In a commercial fleet, changing all drivetrain fluids to AMSOIL usually averages a 5-10% fuel economy improvement.  In rigorously controlled conditions, a small test of commercial Class-8 vehicles got an 8.2% fuel economy improvement by changing all drivetrain fluids to older AMSOIL fluid technologies: now available in historic archives, this was followed up more recently with current products in another test averaging 6.54% improvement.

Improve Your Fuel Economy: the Ultimate Guide

Lessons from the Million Mile Van



Biodiesel fuels produce more rapid breakdown of ANY engine oil, including synthetics.
No matter what brand or type of engine oil you use, you will need to closely monitor your oil performance with oil analysis and shorten drain intervals as your use of biodiesel blends increases.  B2 fuels are not typically a problem for pre-PDF engines, though use of B5 or a higher bio-fuel ratio needs oil sampling analysis.  But for 2007+ PowerStroke engine models which over-fuel the cylinders post-combustion to regenerate the DPF, use of bio-diesel can mean cutting your previous oil drain intervals in half (assuming use of the same engine oil).  If extended oil drain intervals are not shortened to near OEM recommendations or at least monitored with oil sampling, biodiesel contamination is likely to produce engine damage due to oil failure.


Which engine oil should you use in your PowerStroke Diesel?

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To summarize quickly (see Detailed Oil Discussion above), your three choices for PowerStroke engines through 2006 are the 15W-40 Premium Heavy Duty Diesel & Marine oil (product AME, the best option), or the AMSOIL Premium 15W-40 Synthetic Diesel Oil (DME), or the AMSOIL Synthetic 15W40 OE Diesel Oil (OED).  All 2007 and later PowerStrokes models are equipped with the Diesel Particulate Filters (DPF’s), and your truck requires either the recommended AMSOIL Premium 15W-40 Synthetic Diesel Oil (DME), or the AMSOIL Synthetic 15W40 OE Diesel Oil (OED), which exceed the new CJ-4 specification.  For optimal vehicle maintenance and cost, UltimateSyntheticOil and DMT Technical caution the use of OED unless the only objectives are to gain AMSOIL technology with the lowest per-oil-change cost and OEM drain intervals, and oil sampling will not be a Predictive Maintenance (PM) tool.
Any of the three oils will work well for you, and both AME and DME will increase your Duramax fuel economy over your current/past oils, but our best engineering recommendation is for you to make an informed choice based on your specific needs and operational priorities.

Here are our suggestions for choosing the best AMSOIL engine oil for your Duramax fleet:

For this Application…                               Pick this oil:                

2001 – early 2007 (no DPF, CI-4+)                              15W-40 (AME)

2007 & later models (CJ-4 spec is req’d)*                  15W-40 (DME)

Maximum PowerStroke Fuel Economy   15W-40 (AME) or 15W-40 (DME)

Cold Temperature Performance                           Any of the three (-39 to -40oF)

All-fleet oil for home/farm/garden                 15W-40 (AME) or 15W-40 (DME)

Lowest oil usage                                                  15W-40 (AME) or 15W-40 (DME)

OTR Freight Hauling                                         15W-40 (DME)15W-40 (AME)*

All-fleet oil for class 3-8                                    15W-40 (AME) or 15W-40 (DME)*

All-purpose logging/heavy-construction      15W-40 (AME), or 15W-40 (DME)*

OEM drain intervals, no sampling, with short-medium equipment service life:

                                                                         15W-40 (OED)



* The low SAPs of CJ-4 spec oils do extend DPF service cleaning intervals. However, for some fleets the extension may be a minor benefit which may not be as attractive as the CI-4+ benefits of higher TBN and lower wear rates.  Fleet PM engineers should evaluate.

Ultimate Synthetic Oil Diesel Recommendations

NOTE:  15W-40 (DEO) oil is also a fully backwards compatible, all-fleet oil.  So if using one oil for your entire fleet is one of your most important considerations, and your fleet includes 2007+ diesels and earlier models without DPF’s, this is the oil to use.  However, be aware that the TBN constraint imposed by the CJ-4 spec means that extended drain intervals should be validated in your vehicles with oil sampling analysis.  (DME has a TBN of 10.4, vs 12.1 for AME & 9.0 for OED.)  For this reason, our best recommendation is to use two fleet oils: one for gas and 2006 or older diesels, and the other (AME) for 2007+ DPF-equipped diesels.

Simply changing your oil more often with “reputable” oil will not give your PowerStroke all the benefits that AMSOIL offers:

You will not get improved fuel economy, you will not get reduced engine wear, you will not get reduced operating temperatures, you will not get extended drain intervals and you will not save money in the long run.  Please, allow us to show you a better way.  We are here to help you.  You have everything to gain and absolutely nothing to lose! 

Recommendations and Related Articles:

^Up to Page Index   See below for PowerStroke Q&A.

Look up your PowerStroke maintenance details






PowerStroke Owners Questions and Answers 
about lubrication, filtration and other truck maintenance issues:

These e-mailed/posted questions were answered by our degreed automotive engineers.
(None of them are employed by AMSOIL, Inc.)

Q:  What about HEUI injector problems with cold-temperature starting and rough idling? [Petro-glued “stiction”]
Become an AMSOIL Preferred Customer to save up to 25 percent, earn points, get exclusive promotions, and win free gear

What can you tell me about the Archoil AR9100 oil additive?  I used it in my 6.0L HEUI PowerStroke and it made my bad injectors work like new.

Wayne – [Petroglued] in Canada (December 2015)

A:  Wayne –

Thank you very much for the question, because Archoil was new to me.  I’ll have to include the information on “stiction” and Archoil in my new diesel pages and oil additives page.  After digging into this,  I can see how Archoil would resolve your problems with rough starting/idling in cold weather.  Kudos to them for creating a weapon to endlessly and profitably battle the root-cause problem. But, the optimal solution for PowerStroke (and all HEUI diesel) truck owners is to not arm or battle the enemy in the first place but banish them with far superior technology that’s been around since before HEUI systems went into production.  Here’s how I would break it all down:

This is an issue inherent to engines that use HEUI fuel injection systems, because they can boost the normal 22-90 psi engine oil pressures well above 3,000 psi during normal operating conditions.  So the oil is subjected to immense shear forces, and the variety of long, complex, non-uniform petroleum molecules simply cannot hold up under that onslaught like the designed, uniform shorter molecule structures of true synthetic Group IV and V oil base-stocks.  Therefore HEUI engines should only be running a fully synthetic (Group IV/V) oil, because the problems with cold weather startup and lack of cylinder fuel injection are directly caused by petroleum oil deposits on the actuating spool valves that fire the injectors. It’s not actually an “injector problem”, but what could be called an HEUI injector-valve glue-contamination problem: the petro-oil deposits don’t allow the oil-actuated spool valve to move adequately to properly fire the fuel injector when the engine is cold.

It’s interesting that this prevalent petroleum problem is now being identified (started by some marketing group?) with the term “stiction”, when some new word like “petrogumtion”, “petrogummed” or “petrosludged” should be coined to more appropriately identify HEUI injector valves that are gummed-up by petroleum sludge, varnish and carbon deposits.  The “stiction” term was coined prior to 1950 by combining “static” and “friction” into a name for static friction, as being different than dynamic friction: stiction is the frictional resistance to overcome in order to begin sliding (dynamic friction).  Static friction does not describe the adhesion which is incidentally created when tar/varnish is gluing the sliding surfaces together as a bonding material.  Tar and varnish are sticky but fluid when hot, yet they become effective gluing agents when cold, like hot-melt glue.  The force required to break that chemical/physical petro-glue bond is NOT friction – just as a penny that’s stuck with chewing gum to the bottom of a school-desk chair is not held by “friction”.  To me, applying the term “stiction” to this condition is erroneous, and helps to mask the cause.  Hmm… I’ll go with “petroglued”.

If you look at the TruckTrends “stiction” article for HEUI PowerStrokes, they do point to the root cause of petroglued injector spool valves.  These causes are also reflected in Archoil’s rendition of the article.  The contents of Archoil “effectively liquefy the oil, carbon, varnish, and sludge deposits within the spool valve — not to mention it cleans the rest of the injector and entire fluid system.”  So they are identifying the petro-gummed problem, without emphasizing that these deposits are the entire issue. Once you remove the deposits, the problems disappear… and hopefully the contacting valve surfaces have not been too badly damaged, because carbon deposits are extremely hard and abrasive.

To summarize, the TruckTrends guys hooked up and measured the severity of the injector non-firing problem when the engine was cold.  Then they put Rotella T6 in the engine, and poured in the Archoil.  Then they idled the engine for 30 minutes and took it on a 15 mile drive.  This procedure allowed time for the deposits to be dissolved that were causing the spool-valve sticking, and the oil they put in was not going to significantly contribute to recreating deposits.

But they make the deceptive statement “Knowing that changing to a thinner-weight oil wouldn’t alleviate the severe stiction problems with this truck…”.   If we overlook the misuse of the stiction term then they were correct in their statement, but the deception (perhaps unintended) is that the oil wasn’t simply thinner weight – it was also a “fully synthetic” oil, according to Shell (

Although, what Shell deliberately neglects to mention on their website is that the T6 base stock is a Group III (petroleum hydrocracked oil that the petroleum industry agreed to re-name as “synthetic” and conned U.S. government officials into accepting).  The petro industry generally limits the subject of base-stock Group to internal discussions, and avoids educating Consumers about their existence or differences.  In fact Shell’s T6 brochure is a pure marketing piece that compares only the improvements from their previous formulation, and avoids giving actual performance measurement values from standard ASTM tests.  (I can’t help but notice that this benefits Shell in that they give no objective values for the ASTM tests, so that they cannot be directly compared to AMSOIL’s published test data.)  A Group III will perform much closer to a true Group IV or V synthetic than a petroleum oil will – it performs better in cold temperatures and does not break down into deposits as readily.

AMSOIL’s equivalent to Rotella T6 is the 15W-40 OE Synthetic Diesel Oil – not because of the viscosity, but because it is a Group III base-stock, and so is more economical per quart than either Rotella T6 or a true synthetic oil. But while the OE oil does deliver a cold pour point of -36, it only handles standard recommended oil drain intervals.  The better choice is AMSOIL’s 15W-40 AME Premium Synthetic oil, which delivers a conservatively recommended oil-drain interval of 3X Ford’s recommendation, plus AMSOIL’s EA15K88 oil filter which delivers a 70% wear-rate reduction and 15,000 mile filter life.  This extended 15k+ mile drain interval means that AMSOIL is the lowest-cost solution for HEUI oil changes, when annual maintenance costs are the measure instead of per-quart pricing.  When adding the AMSOIL remote bypass filtration system, you can eliminate over 90% of engine wear and extend the drain interval indefinitely, as verified by oil sampling analysis.

Because the Winter viscosity value is determined at 0 F, a 5W rating doesn’t tell the full story in the temperature-performance difference between Group II, III, IV and V base-stock oils.  With a cold pour point of -40, AMSOIL’s 15W-40 equals or outperforms even “5W-40” petroleum oils when the temperature goes sub-zero.  The reality is that if you are going to start a HEUI-equipped diesel engine below -20, you should probably plug in the block heater for a few hours before you expect to start it.

In any case, switching to a synthetic and perhaps using a lower cold-weight oil is the perfect recipe for preventing these poor-starting, rough-idling problems with the 6.0L PowerStroke and other HEUI engines.  The remaining question then becomes how to resolve existing problems: how do you clean out the deposits?  You can either clean using an additive, such as Archoil, or AMSOIL Engine Flush, or you can wait for the additive package of the synthetic oil to “do it’s job” – which can vary greatly depending on driving habits and on which oil you have chosen to use.

Just changing to AMSOIL DOES do the job of cleaning out the engine during the first 500 – 2000 miles, but it can use up enough of the detergent package to reduce AMSOIL’s extended-drain life.  Further, if an engine has a substantial sludge buildup problem, the safe way to clean it out is without engine load at low rpm, using a high detergent concentration for rapid dissolving: this makes it impossible for dislodged sludge pieces to cause engine damage by plugging the oil pump screen or oil passages.  We agree with AMSOIL’s changeover recommendation to use the engine flush procedure with AMSOIL Engine and Transmission Flush, dumping it into a warmed engine and letting it idle for 15-20 minutes prior to draining the oil and installing the AMSOIL oil and filter. (This isn’t new, but well-proven: see converting to AMSOIL.)

If TruckTrends were to perform this standard AMSOIL changeover procedure with another “test mule” truck, they would get identical results of perfect like-new-running performance.  The benefit of doing it with AMSOIL is that the superior performance of the engine oil is fully tested and published in public data, rather than having a mediocre name-brand oil in the truck with an expensive additive every (standard-drain-interval) oil change.  Frankly, AMSOIL’s AME has been an important “secret weapon” for cold-weather diesel fleets for decades and hundreds of millions of miles, delivering superior lubrication technology that completely eliminates pesky HEUI problems.  It’s not AMSOIL-equipped fleets that are buying Archoil, but individual truck users and smaller fleets that don’t know about AMSOIL technology.

AMSOIL Engine FlushBottom-line: Archoil plus a Group III synthetic resolves HEUI injector petro-gluing, but do the math and consider the technology difference.  The 16 oz Archoil 9100 bottle is $42 (USD on ebay with free shipping, or $37 and pay shipping) plus the oil.  The solution of using $10 AMSOIL Engine Flush (to convert) plus AMSOIL synthetic oil is superior, and has lower (or at least equal) annual cost.  In addition, the AMSOIL nanofiber oil filter delivers an additional 70% wear-rate reduction. In fact, with the combination of AMSOIL oil and filters we often see 90% wear-rate reductions.  Archoil can’t accomplish that feat.

Of course, anyone can make generic statements and unsupported claims. Data is where engineering battles marketing on the field of reality. Read through these results of oil analysis, cold-temperature operation and engine teardown of an HEUI engine that is notorious for poor cold-weather starting and rough idling.   Please notice that this severe-duty Midwestern U.S. truck fleet operates year-round near the Canadian border, and was comparing AMSOIL AME to their previous history of trying many oils but primarily using Rotella T as their benchmark standard!  And pay close attention to their change in wear rates across all the engine metals. 

It’s logical that since there were no petro deposits in the engine, there would be none in the HEUI injector actuator spools.  Three excerpts:

“With conventional lubricants, when trucks weren’t plugged in, starting would be difficult, if even possible, and even if the trucks turned over, engine protection would be minimal because no oil pressure would appear on the gauge,” said Johnson. The test truck’s operator, Wayne Carlson, noticed the difference with AMSOIL Synthetic Diesel and Marine Motor Oil right away. “The truck has excellent performance in winter,” said Carlson. “It fires right up without being plugged in and there is instant oil pressure with AMSOIL. In trucks I have driven using conventional lubricants, it could take more than a minute to build any oil pressure when cold, providing little engine protection.” AMSOIL 15W-40 Synthetic Diesel and Marine Motor Oil is formulated to provide exceptional cold-temperature performance.

Use of AMSOIL 15W-40 Synthetic Diesel and Marine Motor Oil, along with oil analysis, has allowed Nordic Waste to extend its trucks’ oil drain intervals to nearly 1,000 hours – four times the length of service possible when using Shell Rotella T.

“We buy significantly less oil, fewer filters and we experience lower labor costs,” said Johnson. “Our biggest savings have been the reduced number of engine overhauls and replacement parts.

Having shared all that, Wayne, I suggest you try this experiment on your 6.0L PowerStroke:  the next time you change your oil, put in AMSOIL AME 15W-40 Premium Heavy Duty Synthetic Diesel & Marine Oil with an EA15K88 oil filter, and don’t do anything but top off the oil for 15,000 miles or 1 year.  (Buy at Wholesale Dealer pricing as a Preferred Customer and have it shipped to your door.)  I also suggest that you pull an oil sample for analysis at the end of that time before you change the oil, so that you know exactly how both the oil and your engine are doing.  Then consider the results, add up your annual costs for oil changes, and decide how you’d like to proceed.  You might also want to consider spending the money (under $500) to add an AMSOIL Dual Remote By-Pass Filtration System, to virtually eliminate oil changes and engine wear. (AMSOIL Bypass oil filtration is another closely-guarded fleet secret.)

Best Regards,

Brian Dobben

Mechanical Engineer,
Welding Engineer,
Automotive Engineer, Lubrication Specialist
Former Senior Engineer – Chrysler Headquarters
LeTourneau University Alumni
AMSOIL University Alumni
Sr Engineer, DMT Technical and
Over 20 years in the automotive industry

Typical advantages of AMSOIL synthetic motor oils and filters:

  • Save time and money with extended oil drains;AMSOIL is Devoted to Protection
  • boost fuel economy 2-10%;
  • lower operating temperatures;
  • reduce engine and component wear by over 70%;
  • triple the remaining life of your lubricated mechanical systems & components.

In nearly every case, AMSOIL‘s synthetic lube and filter products provide best-technology solutions that far exceed OEM specifications. And they provide optimum solutions considering the three greatest automotive insider secrets for vehicle maintenance.  That is why we recommend AMSOIL products.

Recommendations and Related Articles: 

If you want to buy AMSOIL Products, visit our vehicle maintenance page, or the AMSOIL On-Line Store or download a clickable pdf e-catalog

Got a question on your PowerStroke? 

Please .

We make no guarantees that we’re going to publish any e-mail questions / answers, but we reserve the right to do so.  If we choose to publish e-mail content, we will withhold identities and personal information unless we have individual permissions to reveal the authors.  While the content above is often nearly identical to the actual e-mail exchange content, we reserve the right to make minor changes in content or structure to add clarity or appropriate details that would be helpful for online readers.  Added comments are typically [bracketed].

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Copyright 2009, 2015, DMT Technical and 

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AMSOIL has been in business since 1972 and was the first company in the world to develop an API (American Petroleum Institute) rated synthetic lubricant for automotive applications. They coined the phrase “extended drain intervals” 40 years ago with 25,000 mile drain intervals, and ever since then they have been defining the leading edge of lubrication technology, innovation and performance.  No other company in the world offers 25,000 mile oil changes, and AMSOIL guarantees their product performance. No-one else does that. AMSOIL is the Gold Standard in lubrication and filtration, and amazingly, their superior-performance products are cheaper to use.  The fact is, if you’re not using AMSOIL lubricants and filters, you’re wasting money.

We are here to help you and are at your service to assist you in your advanced technology lubrication and filtration needs.  We hope you will allow us to show you a proven better way.  We have many satisfied customers using AMSOIL products in their commercial, trucking, and fleet vehicles, as well as personal, family and recreational vehicles. And now, you know the AMSOIL secret, too.  Welcome to the AMSOIL family.

Typical advantages of AMSOIL synthetic motor oils and filters:

  • Save time and money with extended oil drains;AMSOIL is Devoted to Protection
  • boost fuel economy 2-10%;
  • lower operating temperatures;
  • reduce engine and component wear by over 70%;
  • triple the remaining life of your lubricated mechanical systems & components.

In nearly every case, AMSOIL‘s synthetic lube and filter products provide best-technology solutions that far exceed OEM specifications. And they provide optimum solutions considering the three greatest automotive insider secrets for vehicle maintenance.  That is why we recommend AMSOIL products.

Recommendations and Related Articles: 

If you want to buy AMSOIL Products, visit our vehicle maintenance page, or the AMSOIL On-Line Store or download a clickable pdf e-catalog

Since 1972, AMSOIL Synthetic drivetrain LUBRICANTS have proven to be the highest performance engine oils, greases, transmission fluids, and hydraulic and differential gear oils on the market.
But the other key issue is nanofiber filtration
We cover oil filters, air filters and other fluid filters like NO-ONE else can.  AMSOIL offers the highest performance, most cost-effective, most comprehensive filter line on earth.  Consider air and oil…


Until now, Nanofiber filtration technology has been used exclusively in medical, aerospace, electronics manufacturing, and heavy duty applications, including the US ARMY Abrams M1 tank.   AMSOIL Ea Filters are the first and only filter line to bring this technology to the auto/light truck market.

EaO nanofiber oil filters provide unmatched full-flow filtering efficiency to 98.7 percent at 15 microns, and 50 percent at 7 microns.  This translates to a 70% reduction in engine wear rates, tripling remaining engine life while giving longer filter life and lower pressure drop for better cold-start performance: the only filtration that gives you the best performance in every category!  Compare that to the filters lining the auto-parts shelves, which don’t tell you their common 7,500 mile/6-month design life and either won’t tell you what micron level their efficiency rating is for, or they claim a micron particle size without stating an efficiency: deceptive, meaningless numbers.

Additionally, consider bypass filtration systems for commercial and fleet applications in cars and light, medium and heavy trucks which can filter particles down to less than one micron and are 89% efficient at 1 micronmaking oil changes virtually unnecessary and virtually eliminating engine wear.  (A standard full-flow oil filter can only filter to 20 microns with any reasonable efficiency, but 5-25 microns is widely accepted as the wear-particle size range.)  Easy to install, these oil filter systems have been proven by millions of miles of over-the road trucks, construction equipment and fleet service. And we use these on our personal diesel pickup trucks: my Duramax 2500HD has over 70,000 miles since the last oil drain, the oil analysis looks perfect, and the appearance of this diesel oil looks like a gas engine with 3,000 miles on the oil.


The MOST IMPORTANT filter on the M1A1 Abrams battle tank is its’ nanofiber air filter.On Patrol Abrams M1A1 Battle Tank beats the dust with Nanofiber Filtration Technology
The MOST Important filter on YOUR vehicle is also the air filter.

It’s far better, and easier, to keep wear particles out of the engine than it is to attempt filtering them out of the engine oil.  Yet filter companies and vehicle manufacturer’s are strangely silent about actual air filter performance and engine needs.  Now AMSOIL offers world-leading breakthrough Ea air filters with exclusive nanofiber technology.  Based on battlefield-proven air-induction systems used in military ground and air vehicles, this high-technology filtration is now available for consumer use!  Ea filters are guaranteed for 4 years, 100,000 miles.  The engineering rule of thumb for damaging wear particle size is 5 to 25 microns.  Incredibly, these filters are 100% efficient at removing particles of 3 microns, and are 80% effective at removing particles of a 1 micron size.  This means that NO WEAR PARTICLES CAN GET PAST OUR Ea AIR FILTERS!  AND, they’re less expensive to use than ANY other air filter.

For Power Sports applications, AMSOIL offers a line of oiled-foam filters.  These filters provide better performance than oiled-gauze air filters, and are used almost exclusively in most off-road applications including baja, dirt-track racing, and motocross.

For light to heavy trucks, both gas and diesel engines, AMSOIL’s partnership with Donaldson provides you with the best performance and most cost-effective air filtration systems in the world.  These include both Powercore and Nanofiber technology filters.  We have the full line of  Donaldson Filters Now Available , including nanofiber air, fuel, water, oil and hydraulic filters, with exclusive performance warranties (no one else in the industry offers filtration performance warranties).  Contact us for specific recommendations, or see our Diesel Page.

Air Induction Systems:AMSOIL EaAU universal conical filters replace filters on custom induction systems made by K&N, Injen, S&B, Green, AIRAID, AFE, TrueFlow and Banks

Well-engineered aftermarket air induction systems can provide airflow improvements with gains in horsepower, fuel economy, and towing torque.  Unfortunately in many cases they may also let far more wear particles into your engine than the OEM filter.  And oiled media can contaminate mass flow air sensors, causing problems with emissions, fuel economy and performance that can even damage transmissions in some cases.  AMSOIL lets you leave those problems behind. The full line of nanofiber universal air induction filters (EaAU) are designed to replace stock oil wetted gauze or foam conical filters that were supplied with custom induction systems produced by K&N, Injen, S&B, Green, AIRAID, AFE, TrueFlow and more. Whether your air induction system is in a gasoline street-rod, or a diesel truck, you have great airflow but you need better filtration and more capacity than you get with oiled gauze or foam.  AMSOIL Ea Air Induction Filters are dry no-oil filters with nanofiber filtration media to bring your aftermarket air-intake far better efficiency, 50 times the capacity, and excellent airflow while being easily cleanable – every 25,000 miles.


  • AMSOIL products saves you time and money.  With recommended extended drain intervals, AMSOIL performance typically costs LESS per year than conventional oil changes.
  • The only 25,000 mile/one-year motor oils in the world.
  • The only 25,000 mile/one-year engine oil filters in the world.
  • A vehicle lubrication solution with far less environmental impact, using an estimated 87% less oil and 5-10% less fuel !
  • The only oils and filters with a warranty for GUARANTEED performance!
  • Exceeds the most stringent performance specifications of all major U.S. and foreign automotive and truck manufacturers.
  • Provides up to four-times the wear protection of other motor oils.
  • Increases the mileage life of your vehicle.
  • Improves fuel economy.
  • Increases at-wheel horsepower.
  • Lowers transmission and differential operating temperatures and delivers better shifting, even in heavy towing.
  • Lowers fleet maintenance costs by lowering the costs of both scheduled maintenance, and mechanical repairs.
  • Lowers fleet capital costs by dramatically extending vehicle service-life.  (Fleet vehicle mileage typically extended 20 to 100%.)
  • Diesel oil and filtration products designed to deliver more than 1,000,000 miles for over-the-road trucks before engine overhaul.
  • Used by many national racing teams, fleets, police departments, fire departments, ambulance fleets, construction firms and trucking companies.



DMT Technical operates as part of a group of highly skilled team of OEM Engineers and Lubrication and Filtration Specialists.  In fact, we are the ONLY such group on the internet, as well as the largest AND fastest-growing AMSOIL Dealer organization in the nation.  You too, can join our group when you become an AMSOIL Dealer and take advantage of all that we offer as you use products in your own vehicles or begin your own AMSOIL business. You cannot find a more knowledgeable and skilled group of Dealers anywhere.

In addition, as a Dealer in our group you will receive exclusive unlimited product, technical and business support from the only group of Truck and Automotive Engineers and Lubrication Specialists on the net.  That’s priceless – yet free – vital support that can make a huge difference to a growing business.

We do not run our business purely on the internet. We also have numerous commercial, industrial, trucking, excavating, construction, logging, police, racing and many more accounts that we support and service on a regular basis. We have several fully stocked warehouses and fully equipped shop facilities. This provides us with excellent knowledge of the products, equipment and the business and the ability to respond immediately to any of your needs. We will use this knowledge and experience to help you get started so you too can achieve your goals.

We possess the skills, desire and knowledge to answer questions, solve problems, improve efficiency, reduce downtime, maintenance costs and increase the durability and life of all of your vehicles.

Read what our thrilled customers have to say about us. Read through our website. Contact us with any questions. If you decide to become an AMSOIL Dealer you will be joining, in our opinion, the most skilled AMSOIL group there is. We will help you get started and provide you with the tools and information in order to be successful in this business or with technical and product assistance to use AMSOIL products in your own vehicles.

To get additional information:

We offer several options to receive information on AMSOIL. We welcome the opportunity to work with you personally as your servicing AMSOIL Dealer.  Our AMSOIL Dealer Group is led by former OEM Truck/Automotive Engineers and Lubrication Specialists with over 20 years experience each, who can provide you with unparalleled and valuable advice. This exceptional benefit is unavailable elsewhere. 

Please, email us at  and we will send you exclusive comprehensive info on products, technical and business factors. If you are serious about AMSOIL products and the business opportunity this is the best option. You will receive extensive technical and business support from both myself and my other OEM Detroit, Michigan Truck/Automotive Engineers and Lubrication Specialists with over 20 years experience each. We look forward to helping you learn about AMSOIL.

Or for a smaller, general information package (which includes a catalog and Dealer application) you can request information via any of the links below.  Please note that your information is always held in confidence per our Privacy Policy, and will never be sold, loaned or otherwise distributed.

To request a FREE Factory Direct Catalog by MAIL

To Immediately Download a FREE Factory Direct Catalog

Review Dealer Opportunity Information NOW  OR  Request Information on Becoming an AMSOIL Dealer  

To Buy AMSOIL Products in the AMSOIL On-Line Store

To Sell AMSOIL in Your Store or Purchase For Use in Your Businesses Equipment

To visit the AMSOIL Corporate Website for Product and Business Opportunity Information

AMSOIL is Proudly Made in the U.S.A.

AMSOIL is owned by Americans.

AMSOIL is America’s Oil.

AMSOIL United States and Canada the Filtration and Lubrication Gold Standards

Brian Dobben - former Senior OEM Engineer, USA and Canada Amsoil Synthetic Oil dealer - premium oils and filters

Ultimate Synthetic Oil – AMSOIL Products

Garner, North Carolina  27529

Phone: (419) 551-4792


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