Mercury 8M0173229 Automatic Transmission FluidEngineered for harsh marine environments. Specifically formulated and recommended for use in Mercury Outboards, MerCruiser Inboards, and Tow Sport transmissions requiring DexronIII fluid. Meets Dexron III requirements; Enhanced friction durability for smooth transmission performance; Low viscosity formula for greater fuel efficiency; Resists breakdown from heat, and loss of proper lubricity; Engineered to withstand the rigorous demands of the marine environment; Enhanced oxidation and corrosion protection of internal components;