What kind of oil does a 5.9 Dodge Ram use?

A 5.9 Dodge Ram typically uses 15W-40 or 5W-30 engine oil, depending on the engine type and climate conditions. For the Cummins diesel engine, 15W-40 is commonly recommended, while 5W-30 may be suitable for gasoline engines. Always check the owner's manual for specific recommendations and any updates.