LUBRISTRONG LUBRICANTS 15W-40 SYNTHETIC BLEND HEAVY-DUTY MOTOR OIL API - CJ-4/SN is a high-performance multi-grade parasynthetic lubricant designed for use in high speed, four-stroke diesel engines as well as carbureted, fuel injected, turbocharged and supercharged gasoline engines in both heavy-duty and normal operating conditions. LUBRISTRONGLUBRICANTS 15W-40 SYNTHETIC BLEND HEAVY-DUTY MOTOR OIL API - CJ-4/SN  is formulated with enhanced detergency (High TBN) for optimum performance for engines subjected to diesel fuel with high sulfur content. The detergent additive prevents sludge or carbon deposits especially in extreme heat or pressure conditions. Furthermore, the additive package utilized in this oil is designed for superior protection against wear, corrosion, oxidation and varnish. With superior anti-shear properties and high-viscosity index synthetic and type II paraffinic base stocks LUBRISTRONG LUBRICANTS 15W-40 SYNTHETIC BLEND HEAVY-DUTY MOTOR OIL API - CJ-4/SN  enhances engine performance, extends oil life, eases cold-starts, and eliminates viscosity breakdown.