AMSOIL 25W-40 Synthetic Blend Marine Engine Oil | NMMA FC-W Catalyst Compatible

Engine Performance and Reliability for Fishing and Boating

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 warranty.

Choose Your Product

Protects Against Wear

Marine engines operate under high loads and rpm for extended periods. On average, a marine engine powering a boat 30 mph runs at about 5,000 rpm. In contrast, an automotive engine powering a car 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 and help 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 25W-40 Synthetic Blend Marine Engine Oil is fortified with potent inhibitors that guard against damaging rust and corrosion.

NMMA FC-W Catalyst Compatible

AMSOIL 25W-40 Synthetic Blend Marine Engine 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

Service Life

Four-Stroke Outboard Motors and Personal Watercraft

Change oil at the engine or watercraft manufacturer-recommended interval due to potential fuel dilution or water contamination.

Inboard and Inboard/Outboard

Change oil at two times the engine manufacturer-recommended interval or once a year, whichever comes first.

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

Order AMSOIL 25W-40 Synthetic Blend Marine Engine Oil

Get the right blend of performance and value for your boat.

For wholesale pricing, contact National Synthetics about the Preferred Customer program and save up to 25% on all AMSOIL products.

Frequently Asked Questions

Warranty Secure

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 backed by the AMSOIL Limited Warranty. For complete information visit AMSOIL.com/guarantee.

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.