SYNTHETIC MOTOR OIL MC (SMO-MC) is a premium quality 4-stroke engine oil engineered to meet the latest motorcycle manufacturers’ warranty requirements. SMO-MC 20W-50 is formulated using premium synthetic base oils and is fortified with our proprietary additive package. These special additives are designed to protect your motorcycle from buildup of deposits and to prevent wear imparted on your motorcycle caused by daily driving, whether in a congested city or an open country road.