Shell Rotella T4 Triple Protection 15W-40 heavy duty diesel engine oil, sold as a case of three 1-gallon bottles. This conventional motor oil uses a proprietary synthetic blend formula exclusive to Shell, designed to provide hardworking protection that adapts to driving conditions.

Shell Rotella T4 delivers triple protection against engine wear, deposits, and oil breakdown under high temperatures. In API industry wear tests, it delivered an average of 50% more wear protection than required by CK-4 specifications, and resists oxidation up to 50% longer than the previous generation formula. It also provides improved shear stability for better viscosity control and proven aeration control for fewer air bubbles in the oil.

The low-ash formulation is compatible with exhaust catalysts and diesel particulate filters found on modern low-emission vehicles. Suitable for virtually all modern low-emission heavy duty engines as well as older hard working diesel engines. Excellent choice for on-highway fleets, general haul, construction, agriculture, public transport operators, and diesel pickup trucks, including high-power vehicles requiring resistance to increased heat and stress. Meets API CK-4 specifications with OEM approvals from Detroit Diesel, Mercedes-Benz, Volvo/Mack, Cummins, Allison, and Ford.