How Much Oil Does A 6.7 Cummins Take?

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When it comes to engine oils, there are quite many things to consider. First, you have to consider the oil viscosity and type (synthetic, semi-synthetic, or conventional oil), then also consider the available sizes (in quarts).

Cummins engines typically drive with 15W40 oils, but you should check your vehicle’s manual to confirm. Also, every engine has recommended oil level; you don’t have to underfill or overfill that oil level as such can lead to poor performance of the engine. But how much oil does a 6.7 Cummins take?

Basically, 6.7 Cummins diesel engine can take up to 12 quarts of oil for a complete oil change.

Let’s quickly discuss this in detail below!

What is 6.7 Cummins Diesel Engine?

The 6.7 Cummins diesel engine is mostly found on Ram trucks and other heavy-duty intended vehicles from Ford and GM. It is a turbo diesel engine that delivery so much power for all kinds of driving conditions. 6.7 Cummins diesel engine is the most power engine option for Ram 2500 and 3500 series.

Straight out from the plant, the 6.7 Cummins diesel engine produces a whopping 420 horsepower with 1,075 lb-ft of torque (at its peak). It is one of the most powerful diesel engine options globally. The 6.7 Cummins diesel engine is remarkable for its dependability and rigidity.

How Much Oil Does A 6.7 Cummins Take?

While the actual capacity of your vehicle’s engine is clearly indicated in the owner’s manual, the capacity for 6.7 Cummins is usually 12 quarts (filter inclusive), but the recommended oil viscosity may differ based on the model year you bought.

Most 6.7 Cummins diesel engines use 15W40 full synthetic oils, and some use 10W50 or 10W30.

It is important to know the recommended viscosity and oil type for your 6.7 Cummins diesel engine so you don’t use the wrong one. Apparently, using the wrong oil for your diesel engine will, overtime, affect the performance, and possibly cause the engine to constantly develop faults.

Furthermore, you should replace your 6.7 Cummins diesel engine oil after some time. Now, different drivers have different oil change intervals, but Cummins recommends keeping the intervals at 15,000 miles.  This allows the engine to run smoothly at all times.

When To Change 6.7 Cummins Diesel Engine Oil?

Some drivers wait until they hit 20,000 miles before changing the oil in their vehicle engine. However, Cummins strictly recommends that oil change on its 6.7 engine should not exceed 15,000 miles or 12 months (1 year), whichever comes first.

In other words, you are expected to drain out the old engine oil at least once in a year, or after every 15,000 miles (maximum) and refill. Also, it is advisable to check the oil level in the engine every 3,000 miles; keeping to all these would make your 6.7 Cummins diesel engine last long.

Frequently Asked Questions

Are 6.7 Cummins Engines Reliable?

The 6.7 Cummins diesel engine is a powerful and reliable engine that produces monstrous power for all kinds of heavy-duty, off-road applications. With proper maintenance, and using the recommended fluids, your 6.7 Cummins engine can last over 350,000 miles.

What is 6.7 Cummins Oil Capacity?

With filter included, the oil capacity of 6.7 Cummins is 12 quarts, and if you take out the filter, the capacity is 10.5 quarts. 6.7 Cummins uses different types of oils, depending on the model year and make.

How Often Should You Change Oil In a 6.7 Cummins?

There is nothing wrong if you decide to always change the oil in your 6.7 Cummins engine at 10,000 miles intervals. The manufacturer, Cummins, recommends that ol change must be done before, or at 15k miles. If you drive fewer miles annually, then you should have the oil changed once in a year.

Does a 6.7 Cummins Take Use Synthetic Oil?

Fore sure, you can use full synthetic oils on 6.7 Cummins engines. More so, Cummins endorsed some top full synthetic oils in the market for their engines. You can run both synthetic and blended oils on your Cummins engine. But if you’re going with blends, be sure to know about it’s disadvantages to your vehicle’s engine.


Summarily, how much oil does a 6.7 Cummins take? The model year notwithstanding, Cummins 6.7 turbo diesel engines consume 12 quarts of oil; it could be full synthetic oil or a synthetic blend – ensure to check your owner’s manual.

The 6.7 Cummins is one of the toughest diesel engines in the world; it is available as an option on heavy-duty Ram trucks designed for tough conditions. This engine produces 402hp with 1,075 lb-ft of torque.

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