PURUS® SAE 15W-40 API CK-4/SN Synthetic Blend Diesel Engine Oil is formulated for use in highspeed four-stroke cycle diesel engines designed to meet 2017 model year on-highway and Tier 4 nonroad exhaust emission standards as well as for previous model year diesel engines. This oil is formulated to use in all applications with diesel fuels ranging in sulfur content up to 500 ppm.

Designed to provide enhance 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.