Castrol GTX Diesel is designed to provide superior protection, conforms to the strict requirements of PC-11 engine oil technology and can be used in diesel engines where API CK-4, CJ-4 and below is required.  Its a versatile product which can be used in a wide variety range of heavy duty, commercial vehicles and pick up trucks, which makes it ideal for use in mixed fleets.  Castrol GTX Diesel is specially formulation helps to keep the engine cleaner, giving more reliable engine protection and thus prolonging engine life. Protect your investment with the Castrol Engine Warranty  with coverage for up to 500K miles.  Enrollment is quick, easy and FREE! Learn more and register at www.castrolenginewarranty.com