OEM Suzuki Marine Outboard Synthetic Blend 4-Cycle Engine Oil 10W-40 Quart Listing is for ONE quart bottle. Suzuki Performance Marine 4-Cycle Engine Oil is designed to provide superior lubrication and protection for marine 4-Cycle engines. Synthetic Blend Formula protects the engine from wear, varnish and corrosion. Engineered to the highest of genuine Suzuki quality standards to meet the needs of genuine Suzuki motors. Advanced detergents help keep engine part clean from varnish build-up. Anti-corrosion additives help protect engine from fresh or salt water environments. Viscosity Index Improvers help engine start easily in cold weather. Meets or exceeds the requirements of NMMA FC-W Do not mix with gasoline Not for use in 2-cycle engines