Quicksilver 58Q01-6PK 80W-90 Premium Gear Lube - 32 oz, (Pack of 6) Provides excellent lubrication and wear resistance for outboard lower unit gears Great for both high and low horsepower engines under varying operating conditions Special additives protect gears from metal to metal contact Exclusive formulation helps improve film adhesion to gears Provides warranty protection for all Mercury MerCruiser sterndrive and Mercury Mariner and Force outboard lower units