15W-40 CK-4 Professional 3.78L

KLONDIKE Professional Formula HD Engine Oil is engineered for engines operating under severe service in a wide range of climatic conditions and ambient temperatures. Ideal for use in naturally aspirated and turbocharged heavy duty diesel engines in mobile and stationary equipment where the API CK-4 service category is specified. Advanced API CK-4 additive technology is fully backwards compatible with, and replaces service categories CJ-4, CI-4 Plus, and previous.