Norman Rinehart
Fort Worth, TX & Southlake
CALL (888) 459-9958
         (817)  431-6664
SAE OW-40 4 Stroke Synthetic Motor Oil

Formula 4-Stroke Power Sports Synthetic 
Motor Oil

Formulated for Top ATV and Snowmobile Performance
Reduces wear. 
Wet-clutch compatible. 
Contains no friction modifiers. 
Excellent for use in both hot and cold weather conditions.


AMSOIL Formula 4-Stroke Power Sports Synthetic Motor Oil is specially formulated for ATVs, UTVs, snowmobiles and other powersports applications. Its broad viscosity range and wax-free formulation make it excellent for use in both hot and cold temperature extremes. As an SAE 40-weight motor oil, AMSOIL Formula 4-Stroke Power Sports Oil provides outstanding protection for hot-operating engines, while its 0W rating and -58°F pour point ensure easy cranking, excellent cold-weather starting and quick post-startup protection. Formula 4-Stroke Power Sports Oil is an extreme-temperature lubricant that provides outstanding performance in high-performance, recreational or work/utility engines.


AMSOIL Formula 4-Stroke Power Sports Synthetic Motor Oil is recommended for four-stroke engines. It is also recommended for transmissions in two- or four-stroke applications. It is an all-climate/all-season oil that replaces 0W-30, 0W-40, 5W-30, 10W-30 and 10W-40 oils for ATVs, UTVs, snowmobiles and other powersports equipment. Also recommended as a replacement for Polaris Synthetic PS-4 Plus and Arctic Cat Synthetic ACX. Manufacturers include Polaris®, Honda®, Yamaha®, Ski-Doo®, Can-Am® (Bombardier®), Suzuki®, Kawasaki® and Arctic Cat®.
  • ISO-L-EMA2


AMSOIL Formula 4-Stroke Power Sports Synthetic Motor Oil is compatible with conventional and synthetic motor oils. Mixing AMSOIL motor oils with other oils, however, will shorten the oil's life expectancy and reduce its performance benefits. AMSOIL does not support extended drain intervals where oils have been mixed.

Aftermarket oil additives are not recommended for use with AMSOIL motor oils.
  • AMSOIL engineered Formula 4-Stroke Power Sports Synthetic Motor Oil to withstand the high temperatures of recreational engines. It effectively resists oxidation and oil vaporization to help prevent carbon/varnish formation, control oil consumption and minimize exhaust emissions. It also controls oil thickening, promoting improved fuel economy, and it helps keep engines clean for peak operating efficiency.
  • AMSOIL Formula 4-Stroke Power Sports Oil is wet-clutch compatible and contains no friction modifiers, making it ideal for both two- and four-stroke ATV transmissions. The friction-modifier-free formulation is designed to prevent clutch slippage, helping deliver maximum torque and power to the wheels ‐ a critical feature for towing or high-horsepower engines. It meets the frictional requirements of JASO MA/MA2 and ISO-L-EMA2.
  • AMSOIL Formula 4-Stroke Power Sports Oil is formulated with high levels of anti-wear additives that provide excellent protection for pistons, bearings and gears in transmission-containing units. Its shear-stable, SAE 40 viscosity delivers a thick lubricating film for an extra margin of protection in hard-working engines.
  • Churning occurs in high-rpm engines that can cause oil to foam, depleting its lubricating abilities and increasing heat and wear. AMSOIL Formula 4-Stroke Power Sports Oil controls foam, promoting cooler engine operation and reduced wear.
  • AMSOIL Formula 4-Stroke Power Sports Synthetic Motor Oil contains robust dispersant/detergent additives that effectively neutralize the high levels of acids and combustion by-products prone to small engines. It is anti-rust fortified for superior rust prevention, which is especially important in seasonally or infrequently used powersports equipment.
 I use Amsoil in every motor I have.
I use this in my Can Am Commander Max. It helped quiet the engine immediately and makes it run smoother. After 100 hours of use, the oil looks like I had just put it in the motor. The engine starts easier and runs smoother. I used Amsoil in every motor I have, including my Indian motorcycle.

 I've been using Amsoil for many years!
I have Amsoil in all my gas engines! I've using Amsoil for more than 20 years. Never had any problems or failures..

 ATV Oil
I used this in my Yamaha Warrior over the suggested yamalube. This is hands down the best oil you can run. Engine sounds better. Transmission shifts like a dream. Clutch feels amazing. My ATV did not perform like this on reg oil. Even starts easier since the change over

 Only way to go
I have been using Amsoil Products for years in all my applications, The research and testing is what always keeps me confident that i am buying the best protection that i can.

 Works great.
I use this in all of my small equipment 4 cycle engines. They run smooth and are easy to start even when it's below freezing, which can happen here any day of the year.
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