Monarch Motorcycle – ATV 20W50 is a superior quality, semi synthetic engine oil formulated with advanced additive technology, specifically designed to meet the extreme performance demands required by today’s 4 stroke engines. It is designed to increase engine performance and significantly reduce wear, corrosion, control and protection from engine deposits and allows extended drain intervals. It is suitable for air-cooled and liquid-cooled 4 stroke engines including V-twin engines, and is compatible with wet-clutch transmissions and provides superior gearshift quality.