Mag 1, QT, 10W40 ATV Full Synthetic Engine Oil, High Performance, Specially Formulated To Maximize Power Sports & Racing Competition, Meets Jaso-MA For Wet Clutch Protection & Smooth Positive Shifting, Designed For Maximum Protection At High RPM's Where Shock Loads Are High, Virtually Eliminating Wear & Scuffing On Vital Engine Components, Anti-Rust Protection & Performance Exceeding The NMMA 4 Stroke Watercraft Engine Specifications, Exceeds US & Import Requirements For All 4 Stroke Gasoline Engines, Meets API SI, Jaso MA, Jaso MA-2, ISO-L-EMA2 Is Specified, Provides Excellent Protection In All Conditions Even Under The Most Grueling Racing Conditions.