CK-4 Advanced Heavy Duty SAE 15W40 55GL/D DEF is used to help

DEF is used to help convert NOx to harmless nitrogen and water

freeze-up and boil-over

BlueDEF® Diesel Exhaust Fluid is a mixture of high purity synthetic urea and deionized water that is used in Selective Catalytic Reduction (SCR) systems in diesel vehicles

Ø  Protection against harmful deposits and acids

CK-4 Advanced Heavy Duty SAE 15W40 55GL/D DEF is used to helpCK 4 Advanced Heavy Duty SAE 15W40 55GL D, Heavy Duty Diesel Motor Oils are superior lubricant formulated to meet or exceed the warranty requirements of most manufacturers of diesel and gasoline engines. Field tests have shown our CK 4 oils retain TBN levels for longer periods due to the advanced additive chemistry. Designed for the modern high performance, low emission diesel engines using ERG and Diesel particulate filters, these lubricants offer.