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Duramax Oil: Capacity, Weight And Pressure Of All 11 Types

What are the normal oil capacity, oil weight, and oil pressure of a Duramax engine? If you own a Chevrolet or a GMC that has a Duramax engine, that’s, of course, a question that’s going to pop up every once in a while.

Luckily, we’re here to help you out. In this blog, we’ve outlined all these different aspects of the oil of the Duramax engine. Furthermore, we also explain the optimal time to change the oil, the oil filter, and the Duramax fuel filter, and we advise about what oil you can best use. Read on!

Duramax Oil Capacity And Oil Weight

In the two tables below, we’ve outlined the oil capacity and the oil weight of the 11 different Duramax engines that have been produced since 2001. In the first table, you’ll find the oil capacity and oil weight for the Duramax if you decide not to change the oil filter.

In the table below, you’ll find the oil capacity and filter if you decide to change the oil filter. Read on!

NameQuarts Of Oil (without oil filter)Oil Weight (lbs)DisplacementCylindersProduction Years
LB79.217.306.6V82001 – 2004
LLY9.217.306.6V82004 – 2005
LBZ9.217.306.6V82006 – 2007
LMM9.217.306.6V82007 – 2010
LGH9.217.306.6V82010 – 2017
LML9.217.306.6V82011 – 2016
L5P9.217.306.6V82017 – present
LM26.412.113.0I-62019 – present
XLD285.510.382.8I-42012 – present
LWN5.510.382.8I-42014 – present
XLD254.48.302.5I-42011 – present

Furthermore, the oil capacity and weight changes when we include the oil filter in the equation. Therefore, you’ll find the oil capacity and oil weight in the table below, including the oil filter.

NameQuarts Of Oil (with oil filter)Oil Weight (lbs)DisplacementCylindersProduction Years
LB71018.86.6V82001 – 2004
LLY1018.86.6V82004 – 2005
LBZ1018.86.6V82006 – 2007
LMM1018.86.6V82007 – 2010
LGH1018.86.6V82010 – 2017
LML1018.86.6V82011 – 2016
L5P1018.86.6V82017 – present
LM2713.23.0I-62019 – present
XLD28611.32.8I-42012 – present
LWN611.32.8I-42014 – present
XLD254.89.02.5I-42011 – present

A Duramax 6.6 V8 engine typically has an oil capacity of 9.2 quarts, excluding the oil filter and 10 quarts, including the oil filter. The Duramax 3.0 I-6 (used in Chevy Tahoe and GMC Yukon) has an oil capacity of 6.4 quarts, excluding the oil filter and 7 quarts, including the oil filter. The Duramax 2.8 I-4 (used in Chevy Colorado and GMC Canyon) has an oil capacity of 5.5 quarts, excluding the oil filter and 6, including the oil filter. The Duramax 2.5 I-4 has an oil capacity of 4.4, excluding the oil filter, and 4.8, including the oil filter.

For the oil weight, the following statement is the one that best summarizes it:

A Duramax 6.6 V8 engine typically has an oil weight of 17.3 pounds, excluding the oil filter and 18 pounds, including the oil filter. The Duramax 3.0 I-6 has an oil weight of 12.11 pounds, excluding the oil filter, and 13.2 pounds, including the oil filter. The Duramax 2.8 I-4 has an oil weight of 10.38 pounds excluding the oil filter and 11.3 pounds including the oil filter, and the Duramax 2.5 I-4 has an oil weight of 8.3 pounds excluding the oil filter and 9 pounds including the oil filter.

Duramax Oil Pressure

Finally, it’s also good to look at the oil pressure of a Duramax engine. For the LB7, LLY, LBZ, LGH, and LML, we found official sources that stated the normal oil pressure at different RPMs. For the other Duramax engines, we used anecdotal sources of people that owned GMC’s or Chevrolets that have these engine in them.

A Duramax 6.6 V8 engine typically has an oil pressure of 14 psi idle and 42 psi at 1,800 rpm. A Duramax 3.0 I-6 engine has an oil pressure of 20 psi at idle and 40 psi at 1,800 rpm, and a Duramax 2.8 or 2.5 I-4 has an oil pressure of 13 psi at idle and 40 psi at 1,800 rpm.

As you can see, the oil pressure of a Duramax engine is generally pretty low. Some owners are sometimes worried about this, but hopefully, this table shows you that a Duramax engine’s low oil pressure is normal.

NameOil Pressure (idle, psi)Oil Pressure (1,800 rpm, psi)DisplacementCylindersProduction Years
LB714426.6V82001 – 2004
LLY14426.6V82004 – 2005
LBZ14426.6V82006 – 2007
LMM14426.6V82007 – 2010
LGH14426.6V82010 – 2017
LML14426.6V82011 – 2016
L5P14426.6V82017 – present
LM220403.0I-62019 – present
XLD2813402.8I-42012 – present
LWN13402.8I-42014 – present
XLD2513402.5I-42011 – present

When To Change The Oil Of A Duramax Engine?

How often and when to change the oil of a Duramax engine depends greatly on the manufacturer’s maintenance schedule and the specific type of car you have. We highly advise you to check the owner’s manual of your car to find this out. However, the general statement is as follows:

A Duramax engine should have an oil change every 5,000 – 10,000 miles depending on the car’s maintenance schedule. Furthermore, it is recommended to change the oil filter every 6 months (or 7,500 miles) and the fuel filter every year (or 15,000 miles).

Best Type Of Oil For Duramax Engine?

In general, there are two types of oil recommended for Duramax engines depending on the region you live in. The general rule is as follows:

The recommended oil for a Duramax engine is 15W-40 for general usage. This oil works well for use in normal or higher temperature regions. If you live in a region with lower temperatures, you should go with a 5W-40 oil.

How To Change The Oil On A Duramax Engine?