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Engine performance and reliability are key to a successful day fishing or boating. High-rpm operation and constant exposure to water, however, invite engine wear and formation of rust and corrosion, reducing engine performance and life. AMSOIL 25W-40 Synthetic Blend Marine Engine Oil guards against wear while delivering excellent protection against rust and corrosion. It is Warranty Secure® and will not void your marine engine’s warranty.


  • Fortified with extreme-pressure (EP) additives for superior protection of fast-accelerating, high-torque/horsepower engine.Protects against shock loading from cavitation of heavily loaded engines.Delivers advanced outboard protection against power loss and gear wear, even with up to 15 percent water contamination.

    RESISTS RUST & FOAM
    Designed to prevent rust and is compatible with aluminum, copper and brass alloysResists foam despite water contamination to ensure a strong fluid film and excellent wear protection.Promotes long seal life to help prevent water intrusion.
  • Delivers exceptional wear protection, even when contaminated with up to 15 percent water.1 Extreme-pressure formulation controls damage from shock-loading caused by propeller cavitation. Excellent for fast-accelerating, high-horsepower boats. Protects against rust and corrosion. Keeps seals soft to minimize water leakage. Compatible with other synthetic and conventional oils. Use in fresh- and saltwater applications that require 75W-90 or 80W-90 gear lube and any of the specifications listed below, including lower units made by Mercury/ Mariner,* Johnson/Evinrude,* Bombardier,* Honda,* Yamaha,* Suzuki,* Force/US Marine,* Nissan,* Tohatsu* and Harbormaster;* sterndrives made by Mercruiser-Bravo,* OMC/Bombardier, Volvo-Penta,* Yanmar,* Konrad* and Marine Drive Systems;* V-drives made by Casale & Menkins;* bow thrusters made by Harbormaster Marine;* and transmissions made by ZF Marine Transmission.*


    Use in fresh- and saltwater applications that require 75W-90 or 80W-90 gear lube and any of the specifications listed below, including lower units made by Mercury/Mariner*, Johnson/ Evinrude*, Bombardier*, Honda*, Yamaha*, Suzuki*, Force/ US Marine*, Nissan*, Tohatsu* and Harbormaster*; sterndrives made by Mercruiser-Bravo*, OMC/Bombardier, Volvo-Penta*, Yanmar*, Konrad* and Marine Drive Systems*; V-drives made by Casale & Menkins*; bow thrusters made by Harbormaster Marine*; and transmissions made by ZF Marine Transmission*. • API GL-4, GL-5

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