Castrol CRB Milti is a versatile, multi-purpose, heavy-duty engine oil designed to provide superior protection with diesel engines. It promotes long and healthy engine life, offering protection to diesel engines in a variety of applicatiosn and duty cycles. Engineered to help give long and healthy engine life, giving you peace of mind that your diesel engines are protected in a variety of applications and duty cycles. The versatility makes if a highly practical solution for heavy-duty workshops and mixed fleets. It conforms to the strict requirements of current enging oil technology and can be used in diesel engines where API CK-4, ,CJ-4 and below is required. The formulation helps keep the engine cleaner, which provides more reliable engine protection and thus prolongs engine life across different vehicles in your fleet.