6.6 Duramax oil type and capacity (2023)

If you're familiar with the Duramax motor, you know it's a super powerful motor. And with tremendous power comes the need for the right kind of oil. Now you may be wondering, "What is the right type of oil for my 6.6 Duramax engine?"

Typically a 6.6 Duramax engine needs about 10 liters15w40 or 5w40. This depends on the weather conditions and your driving style.

This article explains more about the oil type, specifications and capacity of your 6.6 Duramax engine. You can also choose the right product from the most recommended products on the market.

Read on to find out more!

6.6 Duramax Oil Capacity

2001-2022 6.6 Duramax has an oil capacity of10 liters including oil filter. For this, the oil capacity decreases9.2 liters without filterchange. It is recommended to change the filter when changing the oil. This ensures the filter is working properly and no contaminated or dirty oil gets into your engine.

6.6 Duramax oil type and capacity (1)


6.6 Duramax oil type

Depending on where you live and weather conditions, two types of oil are recommended for Duramax engines: 15w40 and 5w40. For general use, Duramax recommends use15W-40Oil for your engine 6.6. This oil is suitable for use in normal and high temperature environments.

If you live in a colder climate, a5W-40Oil is a good option. Also, 10W-30 oil is listed as acceptable in 2001-2007 Duramax diesel additives, but is not recommended under any circumstances.

In addition, you can use conventional and synthetic Duramax engine oil.

Required oil specifications

The following is a list of 6.6 Duramax oil specifications. Always check that the oil you choose meets these specifications.

  • 2001 through 2007 model year engines require engine oils that meet API CI-4 or CH-4
  • 2007.5 and current engines require API CJ-4 or CK-4 standard
  • All engines equipped with a Diesel Particulate Filter (DPF) require a low ash engine oil that meets the requirements of API CJ-4 or CK-4. If this parameter is not met, ash can accumulate in the DPF.

The best oil for 6.6 Duramax

Here are some of the best oils for Duramax suggestions. These lubricants have been thoroughly tested and are safe to use in your Duramax. The most important thing is that they meet all of the above requirements. The following sections detail each of the products and categorize them into two groups (5W-40 and 15W-40).


6.6 Duramax oil type and capacity (2)

Shell Rotella Vollsynthetisches T65W40

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Shell Rotella Vollsynthetisches T6

6.6 Duramax oil type and capacity (4)

Shell Rotella Full Synthetic T65w40 Motoröl

Shell Rotella T6 5W-40 Diesel Oil is a fully synthetic product developed for heavy duty diesel engines. The liquid uses Shell's Triple Plus Protection formula. This formula combines base oil with innovative additive technology to provide exceptional protection against wear, oil degradation and hazardous deposits.

Shell Rotella T6 Oil has a wide range of specifications and applications. And the lubricant exceeds the oil requirements for Duramax. One of the most alluring properties of this oil isits 1.5 percent increase in fuel economy over competing products.

In addition, this premium product is exactly what you need when you are looking for the best oil to keep your engine well lubricated. Shell claims that the product can perform well in both high and low temperatures. In addition, it also provides greater protection against exposure to soot, dirt and other contaminants. According to Shell, the use of Rotella T6 5W-40 improves the internal cleanliness of engine parts. This high-performance oil is made with Low-Ash technology that helps control after-treatment device sticking.

Although Rotella T6 5W-40 appears to be a flawless product. It has some disadvantages, namely the fact that it is not available in some markets and it is quite expensive.

Amsoil Signature Series Max-Duty Sintético

6.6 Duramax oil type and capacity (5)

Motoröl Amsoil Signature Series Max-Duty Synthetic 5w40


Amsoil brand diesel engine oils are among the best on the market. By using this product you ensure that your Duramax engine receives the best protection against wear. Third-party testing has verified that the Signature Series Max-Duty Synthetic Diesel Oil provides 6X wear protection compared to other products available. In addition, this technology offers remarkable protection in both on and off-road use. In addition, the fluid offers up to 2 times better protection against oxidation. Thanks to its excellent cleaning ability, the lubricant can deliver up to 60% more turbo cleanliness. This increases the turbo's resilience to the extra demands of lifting heavy loads.

Signature Series Max-Duty Oil is your go-to product when you are looking for a good product that can withstand extreme temperatures.Ensures a better cold start and better oil flow for your engine. The Signature Series offers excellent viscosity control. It also outperforms conventional diesel oils in terms of resistance to thermal degradation. In addition, there is the possibility of using up to 76 percent less oil. In addition, other notable features include excellent high pressure protection and maximum fuel efficiency. Amsoil Low Ash Motor Oil meets or exceeds all required API specifications and exhaust aftertreatment systems. This product does not appear to have any potential downsides so far.

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6.6 Duramax oil type and capacity (6)

Aceite-Diesel Amsoil Max Duty Signature Series 15W-40

6.6 Duramax oil type and capacity (7)

Mobil 115W-40 Delvac 1300 Super

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6.6 Duramax oil type and capacity (8)

Shell Rotella T6 Vollsynthetischer 15W-40 Diesel

Amsoil Maximum Duty Signature-Serie

6.6 Duramax oil type and capacity (9)

Aceite-Diesel Amsoil Max Duty Signature Series 15W-40

This high quality Amsoil product is used for numerous heavy on- and off-highway diesel applications in the market. You don't have to worry about protecting your engine as this product offers the extra protection it deserves. Independent testing has backed this claim for Amsoil Signature Series Max-Duty to provide up to 6x wear protection. That's more than most standard diesel oils can offer.

Similar to its 5W-40 counterpart, the Signature Series 15W-40 oil has good viscosity control. This means better oxidation resistance and resistance to the thickening effect of soot contaminants.

Signature Series 5W-40 can provide the best performance in turbo diesel pickup trucks, on-highway trucks and heavy machinery applications. You can apply this lubricant to improve fuel efficiency.It was specially developed for diesel engines that operate at extremely low temperatures.Oil flow and engine protection are increased with this product in sub-zero temperatures and during cold starts. In my experience, this product, like Amsoil 5W-40 diesel oil, currently has no disadvantages.

Mobil 1 Delvac 1300 Super

6.6 Duramax oil type and capacity (10)

Mobil 1 15W-40 Delvac 1300 Super Motor Oil

(Video) 2018 GMC/Chevy Duramax L5P Diesel Oil Change How-To

The Mobil brand has been the industry leader in providing flawless motor oil products for many years.

Mobil Delvac 15W-40 oil is well known for its long engine and oil life. Mobil specially developed this oil for a range of heavy-duty industrial and marine applications. The lubricant offers protection for on- and off-highway applications. Its formula minimizes the build-up of high temperatures and deposits that could damage your engine. First and foremost, the use of the above product improves corrosion protection and extends oil drain intervals for new and old engines.

Even at high temperatures, the product can perform admirably. In addition, exceptional soot viscosity control contributes to higher engine efficiency. These properties are supplemented by good oxidation and thermal stability, which ensure reliable engine operation. In addition, your engine will get excellent pumpability at low temperatures. Mobil helps reduce maintenance costs because excellent oil consumption control requires less oil topping up during operation. More than that,Meets the demanding specifications of all major Original Equipment Manufacturers (OEMs).The main disadvantages of this lubricant are that it is only available in liter containers and is quite expensive.

Shell Rotella T6 Vollsynthetik

6.6 Duramax oil type and capacity (11)

Shell Rotella T6 Fully Synthetic 15W-40 Diesel Motor Oil

Shell Rotella T6 Synthetic Full Synthetic 15W-40 Diesel Engine Oil is an excellent choice for Duramax engines. Heavy-duty motor oil is used in a wide variety of applications ranging from modern high-performance, low-emission engines to heavy-duty diesel engines. I mean everything from diesel trucks, farms, construction companies, public transit operators, general transportation and highway fleets. The product uses cutting-edge technology to provide Triple Protection Plus against oil deposits, wear and tear and failure.

Compared to conventional diesel oilsThe fluid provides a 1.5 percent improvement in fuel economy while maintaining engine protection and durability.This lubricant is also designed to improve flow at low temperatures. In addition, thanks to unique additives, the formation of sludge, soot and deposits is greatly reduced. This results in a smoother, cleaner and more responsive engine. An added benefit is that its advanced low-ash formulation protects the catalytic converters and particulate filters found in the latest low-emission cars. As a result, everyone benefits from a healthier environment. However, a downside to Rotella T6 15W-40 is that the liquid can be difficult to find in some markets.

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final verdict

With so many different types of oil, it can be difficult to understand everything. And this article aims to give you the best recommendations.

(Video) Top 5 Best Oil For Duramax Reviews in 2023 - Most Popular Collections

As you can see from the detailed explanation above, all the products have great functions and features. However, Shell Rotella T6 5W-40 stands out among them all. Offers excellent protection against oil deposits, wear and breakdowns, among other things.

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If for some reason you can't get it, you can get one of the other products. They have comparable performance and work well with your Duramax motor.


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