Ultra1Plus SAE 5W-40 Full Synthetic Heavy-Duty Diesel Engine Oil API CK-4/SN

Ultra1Plus Heavy-Duty SAE 5W-40 Full Synthetic Motor Oil, API CK-4/SN is formulated with synthetic base oils and a premium additive package. This oil is designed for use in high-speed four-stroke cycle 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. This oil is especially effective at sustaining emission control system durability where particulate filters and other advanced aftertreatment systems are used. Ultra1Plus Heavy-Duty SAE 5W-40 Full Synthetic Motor Oil, API CK-4/SN 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.