How much oil does a 2015 Dodge Ram 2500 6.7 Cummins take?
The engine typically requires about 13 quarts (roughly 12.3 liters) of engine oil with a filter change.
This figure serves as a baseline for the 2015 Ram 2500 equipped with the 6.7-liter Cummins turbodiesel, but the exact amount can vary slightly depending on filter type, any additional oil-cooling components, and specific vehicle configuration. Always verify with your owner's manual or service guide for the precise specification for your VIN.
Oil capacity specifics
Below are the commonly cited capacities for a 2015 Ram 2500 with the 6.7L Cummins. These figures assume a standard oil change that includes replacing the oil filter.
- Oil capacity with filter change: 13 quarts (approximately 12.3 liters)
- Oil capacity without filter change (drain only): about 12 quarts (approximately 11.4 liters)
After draining and refilling, always use the dipstick to confirm the oil level and avoid overfilling, which can impact engine performance and emissions controls.
Factors that can affect capacity
Several variables can cause slight differences in the reported oil capacity for this engine. These include the type and size of the replacement oil filter, whether any additional oil-cooling hardware is present, and minor variations between model years or production lots. For most 2015 Ram 2500 trucks with the Cummins ISB 6.7L, the 12–13 quart range covers the typical requirement.
If in doubt, consult the vehicle’s service manual or contact a Ram/Dodge service center with your VIN to confirm the exact capacity for your specific truck.
Additional considerations
When performing an oil change, it’s also important to choose the correct oil grade. For the 6.7L Cummins in 2015-era Rams, owners commonly use diesel-grade oils such as 15W-40 CJ-4/CK-4 or a specification approved by Cummins. Some owners in colder climates opt for a 5W-40 synthetic that meets OEM approvals. Always follow the oil specification and change interval recommended by the manufacturer to maintain engine longevity and warranty coverage.
Summary
For a 2015 Dodge Ram 2500 with the 6.7 Cummins, plan on about 13 quarts (roughly 12.3 liters) of engine oil when performing a full oil change with a new filter. If you’re draining only, you’ll be around 12 quarts (about 11.4 liters). Use the dipstick to verify the final level and adhere to the recommended oil grade and change interval specified by Mopar/Cummins.
