At https://amsoil.syntheticmotoroil.org shop the Amsoil online store for our Formula 4-Stroke oils – specially formulated to provide serious protection and performance properties recreational four-stroke motors including ATV's, snowmobiles and personal watercraft.

ATV & UTV (2)

Amsoil ATV & UTV 10W40, 5W-50 and 4-Stroke synthetic motor oil.

Dirt Bike Oil (3)

Amsoil Synthetic Dirt Bike Oil is engineered to deliver the performance attributes most requested by on- and off-track dirt bike riders, including consistent clutch feel. Consistent clutch feel is the result of “friction durability,” so whether deep into a race or deep in the woods,…

Formula 4-Stroke Power Sports Syn…

Amsoil Formula 4-Stroke Power Sports Synthetic Motor Oil is specially formulated for 4-stroke recreational motors, ATVs and snowmobiles. Reduces wear. Wet-clutch compatible. Contains no friction modifiers. Broad viscosity range makes it excellent for use in both hot and cold weather conditions.

Formula 4-Stroke Synthetic Scoote…

Amsoil Formula 4-Stroke Synthetic Scooter Oil meets the needs of today’s high-tech air- and water-cooled four-stroke motorized scooters. Unsurpassed wear protection and friction reduction for longer equipment life. Protects transmissions and gear boxes. Wet-clutch compatible to insure smooth clutch operation. Provides long-term protection during…

Marine (3)

Amsoil Marine Oils are specially formulated to provide serious protection and performance properties for marine engines.

Small Engines (2)

Amsoil Synthetic Small Engine Oil is formulated to outperform passenger-car/light-truck oils, protect against wear, deposits and oil consumption in over-worked, under-maintained small engines professionals rely on to make a living.