In 2016, the Ram 2500 lineup included gasoline V8 engines and a Cummins diesel. The recommended oil depends on the engine: gasoline V8s generally require SAE 5W-20 full-synthetic or synthetic-blend oil, while the 6.7-liter Cummins diesel uses a heavier diesel oil such as SAE 15W-40 (CJ-4/CK-4); in very cold climates, 5W-40 may be specified. Always check the owner's manual and the oil fill cap for the exact specification.
Engine options in the 2016 Ram 2500
The Ram 2500 offered two gasoline engines and one diesel option in 2016, each with its own oil requirements. The following subsections summarize typical oil requirements by engine.
Gasoline engines
Gasoline versions of the 2016 Ram 2500 generally require a light viscosity for fuel economy and cold starts. The following oil is commonly recommended by FCA for these engines.
- SAE 5W-20 full-synthetic or synthetic-blend oil
- API Service SN or SP with approval for gasoline engines
- Mopar-approved or FCA-certified engine oil per warranty guidelines
Note: Some environments or trims may allow 5W-30; always confirm via the owner's manual or the oil cap near the engine bay for your exact configuration.
Diesel engine
The 2016 Ram 2500’s Cummins 6.7-liter diesel uses a heavier diesel oil designed to withstand higher heat and load. The typical specification is as follows.
- SAE 15W-40 CJ-4 or CK-4 diesel engine oil
- API CK-4 or CJ-4 performance specification
- In very cold climates, some operators use 5W-40 synthetic diesel oil, but check manual
Again the owner's manual or service bulletin should be consulted for the exact grade and spec, as changes can occur by market and model year.
Practical tips for checking and changing the oil
To help you maintain the correct oil, here are quick steps and reminders you can use when you service a 2016 Ram 2500.
- Confirm the correct engine type in your VIN or window sticker before buying oil.
- Use the recommended viscosity and spec listed in the manual or on the oil filler cap.
- Ensure the correct quantity and replace the oil filter during an oil change.
- Dispose of used oil at an authorized recycling center.
Regular oil changes are essential for longevity, and using the proper oil helps sustain warranties and performance.
Summary
The 2016 Ram 2500 requires different oils depending on the engine. Gasoline versions typically use 5W-20 full-synthetic or synthetic-blend oil, while the Cummins diesel requires heavier oil such as 15W-40 CJ-4/CK-4, with 5W-40 as a cold-weather option in some cases. Always verify with the owner's manual or the oil filler cap for the exact specification and capacity.