6.7L Cummins Oil Capacity
The 6.7L Cummins takes 12 quarts (11.4 liters) of oil with a filter change, and 15W-40 is the standard grade. That capacity is the same for every model year (2007-2026).
Key takeaways
- Capacity: 12 quarts with a filter change - the same for every model year.
- Viscosity: 10W-30, or 5W-40 (all temperatures / below 0F).
- Look for oil meeting API CJ-4/CK-4, Cummins CES 20081, MS-10902 (low-ash).
- Fitted to: Ram 2500, Ram 3500, Dodge Ram 2500 (2007.5-2009).
Oil capacity by model year
| Model years | Capacity (with filter) | Viscosity |
|---|---|---|
| 2007-2018 | 12 qt(11.4 L) | 15W-40 · 5W-40 (all temperatures / below 0F) |
| 2019-2026 | 12 qt(11.4 L) | 10W-30 · 5W-40 (all temperatures / below 0F) |
Capacity is 12 quarts across all model years - what changed for 2019 is the recommended VISCOSITY (15W-40 to 10W-30), which is the source of most of the online confusion. Add oil to the dipstick mark rather than forcing the full 12 quarts.
Oil for the 6.7L Cummins
You need 12 quarts of 10W-30 heavy-duty diesel oil meeting API CJ-4/CK-4, Cummins CES 20081, MS-10902 (low-ash) - that is more than one jug, so buy accordingly. Change the filter with it.
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Shop 10W-30 diesel oilTrucks with the 6.7L Cummins
Looking for a specific year instead? Look up oil by year, make and model.
Frequently asked
How much oil does a 6.7L Cummins take?
The 6.7L Cummins takes 12 quarts (11.4 liters) of oil with a filter change, and 15W-40 is the standard grade. That capacity is the same for every model year (2007-2026).
What oil viscosity does the 6.7L Cummins use?
2007-2018: 15W-40, or 5W-40 (all temperatures / below 0F). 2019-2026: 10W-30, or 5W-40 (all temperatures / below 0F). Look for oil meeting API CJ-4/CK-4, Cummins CES 20081, MS-10902 (low-ash).
Which trucks use the 6.7L Cummins?
Ram 2500, Ram 3500, Dodge Ram 2500 (2007.5-2009), Dodge Ram 3500 (2007.5-2009). It ran from 2007 to 2026.
Should I fill it to exactly 12 quarts?
No - treat the capacity as a guide and finish on the dipstick. Published capacities are nominal, and how much drains out varies with temperature, how long you let it drip, and whether the filter holds oil. Add most of it, run the engine briefly, then top up to the mark.