'PETRONAS Urania 500 SAE 30 is monograde diesel engine, formulated for commercial vehicle diesel engines, where API CF is recommended, to help control against wear and corrosion. It is suitable for all types of older commercial vehicle diesel applications and high-revolution turbocharged diesel engines for both on-highway and off-highway. It is suitable for use in transmission, differentials or final drives in equipment where API CD/CAT TO-2 fluid is required.