6.7 Cummins Oil Capacity
Engine oil capacity for the 6.7L Cummins I6 turbo diesel in Ram 2500/3500, by model year.
Oil capacity, 2025, with filter
12qt
11.4 liters, Ram 2500/3500
Capacities across 7 model years
12qt
The same in every year listed
Source: 2025 Ram 2500/3500 Owner's Manual, page 385. View source ยท Report an error
Oil capacity by model year
| Years | Truck | Capacity | Oil | Source |
|---|---|---|---|---|
| 2025 | Ram 2500/3500 | 12 qt (11.4 L) | 2025 manual, p. 385 | |
| 2020-2023 | Ram 2500/3500 | 12 qt (11.4 L) | 2023: 2023 manual, p. 403 | |
| 2007-2008 | Ram 2500/3500 | 12 qt† (11.4 L) | SAE 15W-40 (API CJ-4) | 2008: 2008 manual, p. 4811 more year2007: 2007 manual, p. 487 |
† The manual lists this as the engine oil capacity without saying whether it includes the filter.
Before you fill
Check the dipstick, not just the number
- Unless marked †, the capacity is for an oil and filter change.
- After filling, check the level on the dipstick before driving.