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How Much Oil Does A 6.7 Cummins Take?

If you’ve recently upgrades your vehicle to one with a 6.7 Cummins engine, then it have have a different oil capacity that what you’re used to with your previous truck.

Assuming that your engine is a post-2010 model, then your 6.7 Cummins engine takes 12 quarts of oil.

Popular trucks with a 6.7 Cummins engine include the heavy duty truck models Dodge Ram 3500 and Dodge Ram 2500.

If you’re planning on changing the oil yourself, then keep in mind that 6.7 Cummins engines that are older than 2010 likely require less than 12 quarts of oil.

Keep reading to learn more about 6.7 Cummins engine oil capacity.

How Often Should You Replace Oil In a Cummins Engine?

Oil Change On A 6.7 Cummins Diesel!

The 6.7 Cummins is a diesel engine that can go for a while before you need an oil change.

On average, the oil in a 6.7 Cummins engine should be replaced every 15,000 miles or six months.

Of course, you should regularly check the oil level in your truck to assess the situation because oil leaks are a common problem with the 6.7 Cummins.

The last thing you want to be dealing with is a costly engine repair due to leaked oil.

You’ll get some warning signs that the oil pressure is low. Here’s what to watch for:

  • Low oil warning on dashboard
  • Engine acting rough or making noises
  • Seeing low oil level on the dipstick

How Much Oil Does A 6.7 Cummins Take?

2018 Ram 3500 6.7 L Cummins Motor Oil Change

For heavy duty Dodge Rams from 2010 or later, the oil capacity is 12 quarts, when you do a filter change.

If you’re not changing the oil filter, then the capacity is only 10 quarts.

Though, most people who change their own oil note that 11 quarts seems to be the max without overfilling it.

For trucks with a 6.7 Cummins engine before 2010, the oil capacity varies.

What Is the Capacity In Gallons

If you prefer to think of engine oil in terms of gallons instead of quarts, then we got you.

The equivalent of 12 quarts of oil is just over 3 gallons of oil.

For trucks with a 6.7 Cummins engine, that oil capacity is just over 3 gallons.

What Type Of Oil Goes In A Cummins Engine?

If you’re going to be doing your own oil changes, then you need to use the right oil for a 6.7 Cummins engine.

Shell Rotella T5 Synthetic Blend 15W-40 Diesel Engine Oil (1 Gallon, Case of 3)

The official recommendation is synthetic 5W-40 oil for driving in below zero-degree Fahrenheit conditions and synthetic 15W-40 oil for driving in temperatures above zero degrees Fahrenheit, according to Cummins.

We suggest:

How To Change Oil On A 6.7 Cummins?

While you shouldn’t attempt to replace the oil on a 6.7 Cummins if this is your very first time doing it, we do have some steps that you can follow to get the job done.

6.7 cummins engine

Here’s what you’ll need:

And here are the basic steps to follow:

  1. Place your WirthCo drain pan under the oil pan’s drain plug.
  2. Remove the drain plug so that the old oil drains out of the engine.
  3. Loosen the oil fill cap to help the oil drain out easier.
  4. Once the oil stops flowing (30-45 minutes), clean and reattach the drain plug securely.
  5. Take the old oil filter out (located through the passenger side wheel well) and discard it. The filter will be attached with a screw.
  6. Install the new oil filter secure by tightening the screw with your hand.
  7. Using the funnel, pour in the new oil.
  8. Check the level by starting the engine, letting it run for a few minutes, and using the dipstick to confirm oil level.

You can also watch the video below to learn how to change the oil in your Cummins engine.

EASY RAM 6.7L Cummins Oil Change How-To

Final Word

As you can see, the 6.7 Cummins engine takes 12 quarts of oil.

Though, most people who change their own oil note that 11 quarts seems to be the max without overfilling it.

You’ll want to replace the oil in your Cummins engine every 15,000 miles, or six months – whichever comes first.

Replacing the oil filter with changing the oil is best for the life of your engine.

And if you want to do the oil change yourself, just follow our steps above.