LubriMatic 11552 High Viscosity 80w/90 Marine Lower Unit Gear Lube, 10 oz. Tube. High-viscosity. Developed specifically for high-horsepower motors subject to heavy usage. Extremely resistant to oxidation and high temperature degradation. Guards against rust and corrosion, resists foaming and is compatible with seals and gaskets used in transmissions, axle housings and other industrial gear units. Meets or exceeds API MT-1 and GL-5 service classifications. Formulated with special anti-wear additives, rust and corrosion inhibitors, this lube is safe to use on all modern outboard and stern drive motors.