Ultra1Plus SAE 15W-40 Full Synthetic Heavy-Duty Diesel Engine Oil – 15W 40 Motor Oil API CK-4/SN (1 Gallon)

Advanced Protection: Ultra1Plus SAE 15W-40 Full Synthetic Heavy-Duty Motor Oil provides 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.
Superior Performance: This motor oil is formulated with synthetic base oils and a premium additive package to exceed the performance criteria of API CK-4, CJ-4, CI-4 with CI-4 PLUS, CI-4, and CH-4. It can effectively lubricate engines calling for those API Service Categories.
Stay-in-Grade Performance: The strong shear stability of Ultra1Plus SAE 15W-40 Full Synthetic Heavy-Duty Motor Oil provides stay-in-grade performance, ensuring the oil maintains its viscosity and protects the engine against thermal breakdown at high temperatures.