Harvest King's SAE 15W-40 all fleet diesel engine oil is designed for engines built in 2007 or later that require an oil rated API CJ-4 or CI-4 Plus. It has exceptional resistance to thermal degradation, and it keeps soot suspended in the oil instead of in your engine components. It contains anti-wear agents that help extend your engine's life, and it also resists viscosity increase as well as the wear and deposit formation that often follows. | Harvest King Diesel 15W-40 Motor Oil | Size 5 gal