SYNAVEX ULTRA HD 5W-40 CJ-4/SM heavy duty engine oil is a fully synthetic, universal engine oil formulated to meet or exceed the warranty requirements of most major manufacturers of diesel and gasoline engines. It is formulated with synthetic base oils that provide thermal stability, oxidation resistance, shear stability, high-VI and excellent low-temperature fluidity.  It meets certain requirements of Detroit Diesel, Cummins, Mack, Caterpillar and Allison. CAM2 SYNAVEX ULTRA HD 5W-40 also meets the requirements of API CJ-4/SM. Enhanced fuel economy can be expected when using CAM2 SYNAVEX ULTRA HD 5W-40 CJ-4/SM due to its enhanced friction protection and lowered operating temperatures.