Chevy GMC Duramax Diesel Engine Oil

Synthetic Oil for Chevrolet Trucks

• Best Duramax Diesel Oil
  
  For the Duramax Diesel, AMSOIL engineers and manufactures a fuel efficient 5W-30 Synthetic Heavy Duty Diesel Oil and a 15W-40 Synthetic Heavy Duty Diesel Oil that when used in conjunction with the AMSOIL Absolute Efficiency EaO-52 Oil Filter will allow you to travel 25,000 miles/1-year between filter changes and 25,000 miles/1-year between oil changes. If you use oil analysis you can usually go longer than 25,000 miles/1-year but that must be documented with oil analysis test results. This is the best diesel oil for your truck.

AMSOIL offers superior lubrication technology for your Duramax Diesel engine. Learn what many manufacturers and servicing dealerships don't want you to know about AMSOIL synthetic motor oil from experienced Truck Engineers and Lubrication Specialists right here in the auto and truck engineering and manufacturing capital of the world- Detroit, Michigan.

We are diesel engine, powertrain and chassis experts and are here to help you achieve optimum performance and longevity from your truck.

You've spent your hard earned money on the Duramax Diesel option in one of the most popular and well engineered trucks there is, now don't you think you owe it to yourself to use the very best oil in it? And 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. This practice is not authorized or condoned by the auto manufacturers, but the fact is it still goes on.

How a servicing dealership can 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 our "Warranty Laws You Need to Know" section of this website to learn more.

For the Duramax Diesel, AMSOIL engineers and manufactures a fuel efficient 5W-30 Synthetic Heavy Duty Diesel Oil and a

15W-40 Synthetic Heavy Duty Diesel Oil that when used in conjunction with the AMSOIL Ea Oil Filters will allow you to travel 15,000-25,000 miles between filter changes and 20,000 miles minimum between oil changes (or one year, whichever comes first). This was established by oil analysis testing. If you use oil analysis you can usually go longer than 20,000 miles. Other AMSOIL benefits include reduced sludge and deposit formation, extreme temperature protection, improved fuel efficiency and rust and corrosion prevention and it does not void any new vehicle warranty. AMSOIL Synthetic Lubricants meet and exceed all API rated and GM Specifications

The other option is to install an AMSOIL Dual Remote By-Pass Filtration System. With this system you only change your oil when oil analysis indicates. The regular full flow filter is changed at 7,500-10,000 mile intervals and the by-pass filter is changed at a minimum of 25,000 miles (or longer with oil analysis). The AMSOIL 15W-40 Synthetic Heavy Duty Diesel Oil  does not break down like conventional petroleum based motor oils, is much more shear stable and does not have the waxes, paraffin's and by-products that come out of crude oil that is pumped from the earth.

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 Duramax Diesels and can provide you with exact installation instructions, tips, bracket prints and photographs of previous installations.

One of the Power Stroke Diesels in our dealer group has 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. We will mail you a copy of this vehicle's oil analysis results with your product and technical information package so you can see the data for yourself. In addition, the AMSOIL by-pass filter will also remove up to a pint of water from your vehicle's lubrication system, which is especially important in a diesel engine. Without this the water promotes rust, corrosion and rapid wear. Internal engine heat also creates acids which also wear the engine components. The water and acids build and continue to work destroying your engine even after engine shutdown.

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 and a decrease in downtime due to premature scheduled maintenance as well enabling calculation of optimum drain intervals that will reduce lubricant costs and assure maximum equipment protection.

Your regular full flow engine oil filter will only remove wear particles down to the 20-25 micron range. The filter cannot remove finer particles because the oil must be filtered quickly while removing most of the particles present in the oil, except the 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 the particles that cause the greatest wear in your engine.

The AMSOIL Ea Oil Filters utilizes nanofiber media that traps and holds dirt throughout its entire thickness whereas a regular folded paper surface-type filter quickly becomes restricted as debris builds up on the paper surface. The AMSOIL full flow filter has 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 HS806 test method.

If you choose not to install the Dual Remote by-pass filtration system then the AMSOIL Super Duty full flow engine filter would be of a significant benefit to the long term durability of your engine as well as allowing for 15,000 miles of service on the filter. When the filter is changed at 15,000 miles all you have to do is top off the oil. When you reach 20,000 miles 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. 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.

AMSOIL has a complete line of synthetic motor oils, greases, transmission fluids, gear lubes, Two-Stage foam air filters, by-pass and full flow filters and filtration systems designed to extend the life of your vehicles and equipment and save you time and money. In addition we also offer a preferred customer wholesale purchase option, retail purchase option or commercial account purchase option for businesses. We also offer a Dealership Option for anyone interested in becoming an AMSOIL Dealer and/or purchasing products at wholesale cost.

How to Reduce or Prevent Turbocharger Bearing Seizures on Duramax Diesels

One of the many specific areas, on turbocharged Duramax Diesel engines, that can clearly benefit from the use of synthetic oil is the turbocharger. When a turbocharged engine is shut off immediately after use, "heat soak" occurs due to the extremely high temperature still present in the turbocharger. 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.

AMSOIL's Synthetic Diesel Oils are inherently more thermally stable than many diesel oils on the market and have been shown to keep turbochargers considerably cleaner than other brands of oil. While poor quality engine oils have been shown to cause turbocharger bearing seizure in under 100 hours during a "heat soak" test.

Many engine oils will survive the 100 hour "heat soak" test, but..., with considerable deposits and incipient oil passage blocking. If you use low quality diesel oils make sure you let the engine idle for a few minutes after use to allow the engine and turbocharger to cool. This does not eliminate deposit formation but it can reduce it.

Take a look at the varnish deposits in this picture. These are the results of a severe high temperature deposit test. This test clearly shows that AMSOIL keeps engines cleaner longer than other major brands diesel oils. Which oil would you rather have protecting your engine?

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.

We are here to help you learn the facts and show you how you can use AMSOIL and get a superior product and also increase the performance and add to the longevity of your Duramax Diesel plus save time and money. Duramax Diesel trucks are excellent vehicles and exceptionally well engineered by General Motors. 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.

We have an article of 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.

Simply changing your oil more often with "reputable" oil will not give you 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.

AMSOIL has been in business since 1972 and was the first company in the world to develop an API (Automotive Petroleum Institute) rated synthetic lubricant for automotive applications. They coined the phrase "extended drain intervals" 30 years ago and have been on the leading edge of technology and innovation ever since then. We have many satisfied customers using AMSOIL products in both their commercial, trucking, fleet as well as personal, family and recreational vehicles.

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• Best Duramax Diesel Oil
  
  For the Duramax Diesel, AMSOIL engineers and manufactures a fuel efficient 5W-30 Synthetic Heavy Duty Diesel Oil and a 15W-40 Synthetic Heavy Duty Diesel Oil that when used in conjunction with the AMSOIL Absolute Efficiency EaO-52 Oil Filter will allow you to travel 25,000 miles/1-year between filter changes and 25,000 miles/1-year between oil changes. If you use oil analysis you can usually go longer than 25,000 miles/1-year but that must be documented with oil analysis test results. This is the best diesel oil for your truck.