ENERGY 10W-40 SYNTHETIC BLEND PASSENGER CAR MOTOR OIL, API SN, ACEA A3/B4 is a multi-grade parasynthetic lubricant designed for use in modern fuel injected gasoline engines. ENERGY 10W-40 SYNTHETIC BLEND PASSENGER CAR MOTOR OIL, API SN, ACEA A3/B4 is formulated with synthetic and type II paraffinic base oils and a special additive package designed for superior protection against wear, corrosion, oxidation and varnish. Furthermore, a unique detergent additive prevents sludge or carbon deposits especially in extreme heat or pressure conditions. With superior anti-shear properties and high-viscosity index type II paraffinic and synthetic base stocks, ENERGY 10W-40 SYNTHETIC BLEND PASSENGER CAR MOTOR OIL, API SN, ACEA A3/B4 enhances engine performance, extends oil life, eases cold-starts, and eliminates viscosity breakdown. This oil exceeds the performance requirements of the American Petroleum's Institute's (API) SN as well as the European Automobile Manufacturers' Association (ACEA) A3/B4 service categories.