AMSOIL 5W-40 100% SYNTHETIC ATV/UTV MOTOR OIL

AMSOIL 5W-40 100% Synthetic ATV/UTV Motor Oil is a severe-service formula built to protect hard-working and high-performance ATVs and UTVs from the punishment of aggressive riding, heavy loads, and extreme temperatures. It delivers reliable wear protection, consistent clutch engagement, and year-round versatility in a single bottle.

ATVs and UTVs operate under conditions that push ordinary motor oils past their limits. Shrouded engine designs trap heat, while accessories like roofs, doors, skid plates, winches, and plows add weight that increases mechanical stress. Aggressive trail riding and demanding chores like plowing or hauling compound the problem, generating heat levels that cause conventional and lower-grade oils to break down prematurely. When that happens, wear accelerates, clutch feel degrades, and sludge starts building up inside the engine.

SEVERE-SERVICE WEAR PROTECTION
AMSOIL 5W-40 Synthetic ATV/UTV Motor Oil uses advanced synthetic base stocks formulated specifically for the punishment ATV and UTV engines take. In Four-Ball Wear testing (ASTM D4172, 150°C, 1800 rpm, 40 kg, 1 hour), the 5W-40 produced a wear scar of just 0.38 mm. That's the same result as the lighter 10W-30 viscosity in the lineup, despite carrying significantly more film strength for heavily loaded engines. The synthetic formulation resists oxidation and thermal breakdown, helping prevent sludge and varnish accumulation in Can-Am Maverick, Can-Am Outlander, CFMOTO ZForce, and Kawasaki Teryx engines that call for a 5W-40 motor oil.

HEAT MANAGEMENT FOR SHROUDED ENGINES
Enclosed UTV cabs and shrouded engine compartments restrict airflow, trapping heat around critical engine components. AMSOIL 5W-40 ATV/UTV Motor Oil posts an HT/HS viscosity of 4.3 cP at 150°C (ASTM D5481), maintaining a robust protective film even at extreme operating temperatures. Its flash point of 228°C (442°F) and fire point of 252°C (486°F) confirm strong thermal stability under sustained high-heat operation. A Noack volatility of just 4.8% weight loss (ASTM D5800) means less oil is burned off during high-temperature service, keeping oil levels more consistent between changes.

SUPERIOR ALL-WEATHER PERFORMANCE
A pour point of -46°C (-51°F) means this oil stays fluid in bitter cold, delivering excellent startup protection during early-season and late-season riding when temperatures drop below freezing. The viscosity index of 177 (ASTM D2270) reflects the oil's ability to maintain stable viscosity across a wide temperature range, resisting both thickening in the cold and thinning under extreme heat and mechanical shear. For riders in northern climates who use their Can-Am Defender or Kawasaki Mule year-round for property work and trail riding, a single 5W-40 oil eliminates the hassle and cost of seasonal oil changes.

CONSISTENT CLUTCH FEEL
AMSOIL 5W-40 ATV/UTV Motor Oil is wet-clutch compatible and contains no friction modifiers that can cause clutch slippage. It meets JASO MA/MA2 standards, promoting smooth shifting and positive clutch engagement throughout the oil's service life. This matters in applications where the engine oil also lubricates the clutch pack, as even small changes in friction characteristics can lead to slippage, fade, or chatter during takeoffs and low-speed maneuvering on technical terrain.

PREMIUM ALTERNATIVE TO OEM FLUIDS
This oil is purpose-built by AMSOIL as a high-performance replacement for OEM-branded fluids in ATVs and UTVs that require a 5W-40 motor oil. It is specifically recommended for machines made by Can-Am, CFMOTO, and Kawasaki. The formulation meets API SN and JASO MA/MA2 specifications and is Warranty Secure, meaning it will not void your vehicle's factory warranty.

SPECIFICATIONS AND COMPATIBILITY
AMSOIL 5W-40 Synthetic ATV/UTV Motor Oil meets API SN and JASO MA/MA2. It is compatible with other synthetic and conventional motor oils, though mixing oils will shorten service life and reduce performance benefits. AMSOIL does not support extended drain intervals where oils have been mixed. Aftermarket oil additives are not recommended.

SERVICE LIFE
Follow the original equipment manufacturer's recommended oil-change interval.