Engine Oil - Diesel Engines: Notes
WARNING: This page is about a different car, the 2013 RAM 3500 HD and 2013 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
Use only Low Ash Diesel Engine Oil meeting standard MIL-2104C or API Classification CJ-4/SM (5.9L), or CJ-4 (6.7L), or higher that meets Cummins CES 20081 Standards.
Low ash diesel engine oil is REQUIRED for the 6.7L engine, use MOPAR® MaxPro15W40 6700 Diesel DPF diesel engine oil, or equivalent.