Engine oil AMSOIL 10W-40 Formula 4-Stroke® Marine Synthetic 3.78L

Specially engineered for marine applications. Durable formulation protects in severe conditions, from all-day trolling to high-rpm operation. Heavily fortified with advanced additives designed to prevent deposits, rust and corrosion. Use in gasoline-fueled four-stroke inboards, outboards and personal watercraft.
FIGHTS ENGINE WEAR
Naturally strong base oils resist viscosity loss due to mechanical shear.
Develops a tough lubricating film that protects engine parts, even in high-heat, high-rpm conditions.