Mobil 1 Turbo Diesel Truck 5W-40 fully synthetic motor oil is engineered for hard-working diesel engines. It offers outstanding wear protection, oil consumption control and performance reserve. Whether hauling, towing heavy loads, driving off-road, or just dealing with stop-and-go driving, Mobil 1 Turbo Diesel Truck provides outstanding protection for diesel engines. Engineered to help extend engine life in modern turbo-charged diesel engines, this formula meets the latest industry standards, including CJ- 4, and exceeds the requirements for both light duty and heavy duty diesel equipment. Mobil 1 Turbo Diesel Truck reduces low-temperature sludge build-up and high-temperature deposits through excellent thermal and oxidation stability. High temperatures pose little threat as Mobil 1 Turbo Diesel Truck fully synthetic motor oil maintains its viscosity and has enhanced oil film strength, which helps to reduce engine scuffing and bore polishing. It also provides wear protection and reduced oil consumption with its shear stability.