AMSOIL 25W-40 Marine Semi-Synthetic Engine Oil (WCM)

AMSOIL 25W-40 Marine is a semi-synthetic (synthetic-blend) engine oil formulated specifically for marine engines that operate under high loads and sustained high rpm. It’s designed with excellent shear stability to help maintain a consistent lubricating film, protect against wear, and deliver strong performance in harsh, humid environments that promote rust and corrosion.

Key Benefits

• Excellent high-stress, high-rpm endurance

• Shear-stable formulation helps maintain a consistent lubricating film

• Fortified with inhibitors for increased rust and corrosion protection in humid/wet environments

• NMMA certified for four-stroke marine applications (FC-W Catalyst Compatible)

Applications (Specifications / Approvals)

Use in gasoline-fueled four-stroke inboards, outboards, inboard/outboards and personal watercraft that require any of the following:

• API SM

• NMMA FC-W Catalyst Compatible

• FC-W (CAT)

Change / Drain Interval (Service Life)

• Four-stroke outboard motors and personal watercraft: Change oil at the engine/watercraft manufacturer-recommended interval due to potential fuel dilution or water contamination.

• Inboard and I/O applications: Change oil at two times the engine manufacturer-recommended interval or 1 year, whichever comes first.

Note: Always confirm the required viscosity and specifications in your owner’s manual before use.