PURUS® Synthetic SAE 5W-40 API CK-4 Engine Oils are fully formulated for use in high-speed four-stroke cycle premium diesel engines designed to meet 2017 model year on-highway and Tier 4 non-road exhaust emission standards as well as for previous model year diesel engines. These oils are formulated for use in all applications with diesel fuels ranging in sulfur content up to 500 ppm.

PURUS® Synthetic SAE 5W-40 API CK-4 Diesel Engine Oils are designed to provide enhanced protection against oil oxidation, viscosity loss due to shear, and oil aeration as well as protection against catalyst poisoning, particulate filter blocking, engine wear, piston deposits, degradation of low- and high-temperature properties, and soot-related viscosity increase.