Formula 4-Stroke ATV Synthetic 0W-40 Motor Oil

PowerSports 0W-40 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.

Buy & Pricing

“A top seller of our AMSOIL Inventory! Amazing results for ATV and UTV riders in all temperature extremes.”

AMSOIL Formula 4-Stroke Synthetic ATV 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 -60°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.

The 0W-40 is often selected as an upgrade from the other two ATV oils (10W-40 and 5W-50). Check our lookup guide which uses OEM owners manuals to match products for you, to see if that choice is available for your ATV or UTV

In addition to the information below, the throttling nature of ATV riders cause specific issues addressed by this oil. Also be sure to purchase our SEMA product of the year – QUICKSHOT to restore the intake system to a like new condition. Using Quickshot in a 1/2 dose also stabilizes fuel for up to 3-month storage.


Resists Heat and Thermal Breakdown

AMSOIL engineered Formula 4-Stroke Power Sports Synthetic Motor Oil to withstand the high temperatures of recreational engines. ATV’s and UTV’s often have smaller sumps which cause the oil life to be significantly shortened. Thus why this product is unique! 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.

Excellent For Transmissions

AMSOIL Formula 4-Stroke ATV 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.

Superior Wear Protection

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. This is where you will notice the performance over the life of the oil interval. Others sheer out early in their life which effects the overall feel and decrease in oil pressure.


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. 

Special Additives

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.

It’s easy for other oil companies to go real cheap here as these additives to make this blend work for the duration are costly. When performance and protection matter, AMSOIL is your only choice. 


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 ATV and 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.

Follow the equipment manufacturer’s recommended drain intervals.

Buy & Pricing

AMSOIL products are backed by a Limited Liability Warranty. For complete information visit

This product is not expected to cause health concerns when used for the intended application and according to the recommendations in the Safety Data Sheet (SDS). An SDS is available via the Internet at or upon request at (715) 392-7101. Keep Out of Reach of Children. Don’t pollute. Return used oil to collection centers.


Here are some testimonials from AMSOIL’s site:


I will purchase this product again

By snakesc

from Lincoln University Pa

Verified Buyer

We use it in our 4wheeler YFZ450 with exceptional results, no wear whatsoever.

Another trusty Amsoil product .

By Thetorque

from Milroy PA

Verified Buyer

I started using this product in my 2003 Polaris 330 Magnum.
Reduces heat and provides the startup lubrication I wanted.

Hands down the best of the best!

By Madhunter73

from Lecompte, Louisiana

Verified Buyer

I recently switched to Amsoil i use it on everything i have that uses oil and would never use anything without Amsoil name on it!! i just recently purchesedFormula 4-Stroke Power Sports Synthetic Motor Oil
for my 700 Yamaha Grizzly and am highly impressed so far, you barely can read the dipstick after some serious riding for the money and if your looking for Quality first rated oil look no further than Amsoil!

Peace of mind

By Pauly

from 53051

Verified Buyer

I use this 0-40 oil in my turbo snowmobile.
Knowing it’s excellent protective properties, I never concern myself with engine issues. Sled now has 11000 miles on it and runs as good as the day I bought it.

Excellent Product

By ResQU

from Bakersfield, CA.

Verified Buyer

In the winter, I put this in my 2014 BMW K1600GTL. BMW recommended their 5-40w which is good too, however this Amsoil has a better rating and the lower viscosity allows for quicker pick up and I can actually hear the difference in the followers. In the summer I’ll run Amsoil’s Metric Motorcycle.



from undisclosed

Verified Buyer

Trx 650 rincon trx 300 easy start cure rincons cold shitfing



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