AMSOIL Motor Oils
Marine Motor Oil
SAE 10W-30 Formula 4-Stroke® Marine Synthetic Motor Oil (WCT) 10W30 SAE 10W-30 Formula 4-Stroke® Marine Synthetic Motor Oil (WCT)

AMSOIL 10W-30 Formula 4-Stroke® Marine Synthetic Motor Oil (WCT) is a premium quality synthetic formulation engineered for the harsh operating conditions of marine environments. It withstands the intense mechanical action of continuous, high RPM ...

SAE 10W-30 Formula 4-Stroke® Marine Synthetic Motor Oil (WCT)
10W-40 Synthetic Formula 4-Stroke Marine Oil (WCF) 10W-40 Synthetic Formula 4-Stroke Marine Oil (WCF)

For use in 4-stroke gasoline fueled engines in marine applications. Offers unsurpassed wear protection, viscosity stability, low volatility and excellent rust protection. NMMA FC-W approved and "warranty certified". For use in 4-stroke outboard and m...

10W-40 Synthetic Formula 4-Stroke Marine Oil (WCF)
15W-40 Heavy-Duty Diesel & Marine  Motor Oil (AME) Synthetic 15W40 Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)

Engineered for pre-2007 diesel engines in on-road applications as well as all model year diesel engines in off-road applications. High 12 TBN controls acids from combustion blow-by and EGR. Additives control soot thickening, oxidation and wear. Exten...

Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)
25W-40 Synthetic Blend Marine Engine Oil 25W-40 Synthetic Blend Marine Engine Oil

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...

25W-40 Synthetic Blend Marine Engine Oil
HP Marine Synthetic 2-Stroke Oil (HPM) HP Marine Synthetic 2-Stroke Oil (HPM)

High-quality motor oil is critical for maximum performance in modern two-cycle marine motors. Direct fuel injection (DFI) improves combustion efficiency, delivering the extra power enthusiasts want, while leaner gas-to-oil ratios provide the reduced ...

HP Marine Synthetic 2-Stroke Oil (HPM)
Outboard 100:1 Pre-Mix Synthetic 2-Stroke Oil (ATO) Outboard 100:1 Pre-Mix Synthetic 2-Stroke Oil (ATO)

Designed for pre-mix applications as lean as 100:1 ratios or richer. Improves throttle response and lowers or eliminates smoke. Minimizes deposit formation and lowers emissions. Performance emphasis on the cooler operations of water-cooled motors.

Outboard 100:1 Pre-Mix Synthetic 2-Stroke Oil (ATO)
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