The Ram 2500 with the 6.7-liter Cummins turbo diesel typically requires about 11 quarts of engine oil when performing an oil-and-filter change (roughly 10.5 liters). Without replacing the filter, the capacity is around 10 quarts. In practice, plan to use about 11 quarts and verify the level with the dipstick as you top off.
Oil capacity can vary slightly by model year and engine revision, so always confirm with the owner’s manual or a dealer service bulletin for your exact truck. The following notes cover typical figures and best practices for a standard oil change.
Typical oil capacity and what affects it
Before listing the numbers, here is a quick note on what influences the amount you’ll need.
- Oil filter replacement adds roughly 1 quart to the total fill.
- Most Ram 2500 6.7L Cummins manuals cite about 11 quarts with filter; about 10 quarts without filter.
- Some years may list minor variations, but 11 quarts with filter is the common guideline.
When you perform the change, start by adding about 11 quarts, then check the dipstick and top off in small increments to reach the full mark.
Oil type and change intervals (quick guidance)
Along with capacity, use the recommended oil grade and change interval for your year. Most 6.7L Cummins Ram 2500s call for full-synthetic diesel oil, commonly 5W-40, meeting API CK-4 or equivalent specs. Check the owner's manual for the exact specification and interval based on your climate and driving conditions.
Summary
For the Ram 2500 with the 6.7L Cummins, plan on about 11 quarts of engine oil when you do an oil change with a new filter, and about 10 quarts if you’re not replacing the filter. Always confirm exact capacity for your model year and use the correct oil grade. After pouring, verify the level on the dipstick and top up as needed to the full mark.