Yamalube GL4 SAE 90 Gear Oil is a high quality universal marine gear oil developed for professional and leisure boating. It is suitable for use in outboard motor and sterndrive gear cases. Excellent viscosity stability during operation Reduced friction for smooth gear performance Exceptional anti-wear and anti-corrosion protection Powerful antioxidant and detergent action Strong dispersancy to prevent sludge buildup Excellent anti foam properties Good cold flow characteristics for easier operation API: Equivalent to API CF Viscosity: SAE 90 Product Type: Marine Gear Oil