Mineral-based gear oil specifically formulated for use in 4-, 5- and 6-speed high performance gear boxes. Robust, shear-stable formulation is designed for Harley-Davidson? transmissions or V-Twin models without wet-clutches. Proprietary shape combines the finest mineral base stocks with industry leading extreme pressure and anti-wear additives to ensure ultimate hardware protection and smooth shifting. Exceeds the requirements of API GL-5.