25W40 Marine Oil

AMSOIL 25W40 Marine Oil is certified by the National Marine Manufacturers Association (NMMA) for use in four-stroke outboards, inboards, stern drives (inboard/outboards), and PWC.  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 the formation of rust and corrosion, reducing engine performance and life. AMSOIL Synthetic Blend 25W40 Marine 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.

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Description

AMSOIL Synthetic Blend 25W40 Marine Oil

NMMA25W40 Marine Oil is a synthetic blend of marine engine oil engineered by AMSOIL that guards against wear while delivering excellent protection against rust and corrosion. Marine engines operate under high loads and rpm for extended periods. On average, a marine engine powering a boat at 30 mph runs at about 5,000 rpm. In contrast, an automotive engine powering a car at 60 mph runs at about 2,000 rpm. Higher stress causes traditional automotive oils to break down and lose viscosity. AMSOIL 25W-40 Synthetic Blend Marine Engine Oil is designed with excellent shear stability to deliver a consistent lubricating film. It helps guard engine components from wear for maximum life.

Excellent Anti-Rust Performance
Marine engines are prone to rust and corrosion due to constant exposure to humid, wet environments. Rust on engine parts acts like sandpaper, scouring bearings, the cylinder wall, piston rings, and other components, while aluminum pistons and other parts can corrode. Rust and corrosion reduce engine power and eventually cause catastrophic failure.

Good rust protection is not natural to motor oil; it comes only by design. AMSOIL 25W40 Marine Oil is fortified with potent inhibitors that guard against damaging rust and corrosion.

  • Excellent high-stress, high-rpm endurance
  • Increased rust and corrosion protection

NMMA Certified
AMSOIL 25W40 Marine Oil is certified by the National Marine Manufacturers Association (NMMA) for use in four-stroke outboards, inboards, stern drives (inboard/outboards), and PWC. This high-quality oil demonstrates outstanding performance and exceeds the NMMA “FC-W” (Four Cycle Water) specification requirements.

  • FC-W (CAT)® Registration Number: FC-11825T

* All trademarked names and images are the property of their respective owners and may be registered marks in some countries. No affiliation or endorsement claim, express or implied, is made by their use. All products advertised here are AMSOIL-engineered for use in the applications shown.

APPLICATIONS
Use in gasoline-fueled four-stroke inboards, outboards, inboard/outboards, and personal watercraft that require any of the specifications listed below, including those made by Mercury* and Mercruiser*.

  • API SM
  • NMMA FC-W Catalyst Compatible

SERVICE LIFE
Four-stroke outboard motors and personal watercraft: Due to potential fuel dilution or water contamination, change oil at the engine or watercraft manufacturer-recommended interval. Inboard and I/O applications: Change oil at two times the engine manufacturer-recommended interval, or once a year, whichever comes first.

WARRANTY
AMSOIL 25W-40 Synthetic Blend Marine Engine Oil is Warranty Secure®, keeping your factory warranty intact. It is a high-performance replacement for vehicle manufacturer-branded products and is also backed by the AMSOIL Limited Warranty (G1363). For details, visit www.amsoil.com/warranty/.

Warranty Secure

HEALTH & SAFETY
This product is not expected to cause health concerns when used for the intended application and according to the recommendations in the Safety Data Sheet (SDS). And SDS is available via the Internet at www.amsoil.com or upon request at (715) 392-7101. Keep Out of Reach of Children. Recycle used oil and bottle.

Technical Specifications

SDS

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Data Bulletins

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WARRANTY

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