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AMSOIL 4-STROKE OILS
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Synthetic Small Engine Oil

Formulated to outperform passenger-car/light-truck oils, AMSOIL Synthetic Small-Engine Oil protects against wear, deposits and oil consumption in over-worked, under-maintained small engines professionals rely on to make a living. 
5W-30
10W-30
10W-40
15W-50
Fights Power Loss

Reduces Oil Consumption

Preserves engine power

Helps cut maintenance costs

Long Service Life

Fights heat and deposits
FORMULA 4-STROKE
Power Sports

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.
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. Provides long-term protection during storage.
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. Provides long-term protection during storage.
Synthetic Dirt Bike Oil
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, riders can feel confident their clutch will perform from start to finish. AMSOIL-exclusive advanced chemistry provides outstanding engine reliability for worry-free operation under severe conditions. 

Synthetic ATV/UTV Oil
Developed by AMSOIL for hard-working and performance ATVs and UTVs. Advanced synthetic technology resists oxidation and protects against extreme heat to help prevent sludge and varnish. Excellent cold-flow ability for quick starts in cold temperatures. Cools shrouded engines.
10W-30
5W-40
10W-40
0W-50
5W-50
Briggs & Stratton 4T Racing Oil  
Briggs & Stratton Synthetic 4T Racing Oil is the brainchild of a joint effort between Briggs & Stratton engineers and AMSOIL INC. Briggs & Stratton came to us with a request: develop a motor oil capable of maximizing horsepower while handling the intense heat and shearing forces inside its competition four-stroke engines. Synthetic 4T Racing Oil is the result. It's specially engineered for competition engines without the shortcomings of automotive, PAG or conventional "karting" oils. It's perfect for racers who want to get the most horsepower and longest life from their engines used in kart, junior drag, quarter midget and other racing applications.
Tested and Validated by Briggs & Stratton and AMSOILs

Combines the protection of a heavier oil with the performance of a lite oil

Reduces harmful heat

Inhibits foam

Long Service Life

Resists corrosion
SAVE UP TO 25%

$10 for a six-month membership
Save up to 25% on Every Order
Exclusive promotions and more
FREE SHIPPING

Order $100 or more in AMSOIL products at full retail prices and receive free ground shipping anywhere in the continental U.S.