AMSOIL 5W-40 100% Synthetic ATV/UTV Motor Oil
AMSOIL 5W-40 100% Synthetic ATV/UTV Motor Oil is a severe-service formulation built for ATVs and UTVs that call for a SAE 5W-40 grade. Carrying API SN and JASO MA/MA2 service category and wet-clutch friction credentials, this 5W-40 targets Can-Am, CFMOTO, and Kawasaki ATV and UTV applications that need a wider-range oil than a 10W-40 for cold mornings, year-round riding, or heavy chore and trail duty.
Severe-service engine protection
Aggressive trail riding, hauling, plowing and adding accessories like roof and door panels, skid plates and winches push ATV and UTV engines past the load profile that conventional motor oils were designed for. The synthetic base stocks in this 5W-40 deliver reserve protection against the heat that builds up in shrouded, high-revving powersports engines, and a Four-Ball Wear scar of 0.38 mm under ASTM D4172 demonstrates the wear control that severe-duty operators look for.
An HT/HS viscosity of 4.3 cP at 150 degrees C under ASTM D5481 keeps a strong oil film between heavily loaded sliding parts at peak operating temperature, helping the engine stay protected when the throttle stays wide open across long, sustained pulls.
Cold-flow ability and year-round viscosity range
The 5W winter rating widens the operating window for owners who ride in cold mornings, fall and spring conditions, or year-round climates that swing from frost to triple-digit heat. A pour point of -46 degrees C (-51 degrees F) under ASTM D97 keeps the oil flowing on subzero cold starts, when oil-starved wear is most likely to occur. A kinematic viscosity of 16 cSt at 100 degrees C under ASTM D445 keeps the formula in the SAE 40 range once the engine reaches operating temperature, so the OEM-required film thickness is preserved during summer trail rides and heavy work.
Oxidation, sludge and varnish resistance
Advanced synthetic chemistry resists oxidation under the prolonged high-heat conditions powersports engines see during chore work and aggressive trail use. A Noack volatility result of 4.8 percent under ASTM D5800 keeps oil consumption low and reduces the deposit-forming light ends that drive sludge and varnish in air-cooled and shrouded engines. A flash point of 228 degrees C (442 degrees F) and fire point of 252 degrees C (486 degrees F) under ASTM D92 reflect the controlled volatility built into the formula, while a viscosity index of 177 under ASTM D2270 supports stable film strength as oil temperature climbs.
Wet-clutch compatibility and consistent feel
Many ATV and UTV designs use a wet-clutch sharing a sump with the engine, so the motor oil has to grip the clutch plates rather than slip them. AMSOIL 5W-40 100% Synthetic ATV/UTV Motor Oil contains no friction modifiers and meets the JASO MA/MA2 wet-clutch friction standard, supporting positive clutch engagement, smooth shifting and consistent clutch feel during takeoffs and tight, technical maneuvering on the trail.
Purpose-built alternative to OEM-branded fluid
This 5W-40 was formulated as a performance-engineered alternative for Can-Am UTVs and ATVs that require a 5W-40, giving owners a single high-quality lubricant without sourcing OEM-branded fluid for every service. Use of AMSOIL synthetic lubricants does not void a factory warranty, and AMSOIL 5W-40 100% Synthetic ATV/UTV Motor Oil is Warranty Secure and backed by the AMSOIL Limited Warranty.
Recommended applications and service intervals
Use AMSOIL 5W-40 100% Synthetic ATV/UTV Motor Oil in ATVs and UTVs that require a 5W-40 motor oil, including units made by Can-Am, CFMOTO, and Kawasaki. The formula meets API SN and JASO MA/MA2.
- Normal and severe service: follow the original equipment manufacturer oil-change recommendation in the owner manual.
- Confirm application match for a specific machine using the AMSOIL vehicle lookup guide or the AMSOIL ATV and UTV oil guide.
- Not formulated for two-stroke ATV engines, racing-only applications, or units that require a different SAE grade such as 10W-40, 5W-50 or 0W-50.
- Outside the United States and Canada, verify regional product availability before ordering.
Pair an oil change with a fresh AMSOIL or OEM oil filter sized for the application. The formula is compatible with other synthetic and conventional motor oils, but mixing shortens its service life and reduces performance benefits, and extended drain intervals are not supported when oils have been mixed. Aftermarket oil additives are not recommended in AMSOIL 5W-40 100% Synthetic ATV/UTV Motor Oil.
Typical technical properties
| Property | Value |
|---|
| Kinematic viscosity at 100 degrees C, cSt (ASTM D445) | 16 |
| Kinematic viscosity at 40 degrees C, cSt (ASTM D445) | 97.4 |
| Viscosity index (ASTM D2270) | 177 |
| HT/HS viscosity at 150 degrees C, cP (ASTM D5481) | 4.3 |
| Flash point, degrees C (degrees F) (ASTM D92) | 228 (442) |
| Fire point, degrees C (degrees F) (ASTM D92) | 252 (486) |
| Pour point, degrees C (degrees F) (ASTM D97) | -46 (-51) |
| Noack volatility, percent weight loss (ASTM D5800) | 4.8 |
| Four-Ball Wear Test, scar diameter, mm (ASTM D4172) | 0.38 |
Order AMSOIL 5W-40 100% Synthetic ATV/UTV Motor Oil
AMSOIL 5W-40 100% Synthetic ATV/UTV Motor Oil ships in quart bottles (product code AUV54QT-EA) and a case of twelve quarts (product code AUV54QT-CA), and is backed by the AMSOIL Limited Warranty. To match the right viscosity, API service category and JASO clutch rating to a specific Can-Am, CFMOTO or Kawasaki ATV or UTV, use the AMSOIL vehicle lookup guide together with the AMSOIL ATV and UTV oil guide before ordering. Order AMSOIL 5W-40 100% Synthetic ATV/UTV Motor Oil.
Customer reviews
amsoil for my atv
dealers in my area dont always have amsoil in stock, i can order from amsoil and get everything i want! and fast shipping!
By Mark from jackson ca. on July 06, 2026.
Would recommend this to a friend.
Mr
Excellent product.
By Sas on July 01, 2026.
Would recommend this to a friend.
Great oil
Great oil but many small engine vehicles need only .8 of a quart. We're wasting a lot of oil as a country. .2 of a quart at a time.
By Papabear on May 30, 2026.
Would recommend this to a friend.
Read all 272 reviews
Frequently asked questions
Which ATVs and UTVs use AMSOIL 5W-40 100% Synthetic ATV/UTV Motor Oil?
This 5W-40 is intended for ATVs and UTVs that require a 5W-40 motor oil, including units made by Can-Am, CFMOTO, and Kawasaki. Always confirm the SAE grade and OEM service category against the owner manual or the AMSOIL vehicle lookup guide before changing oil.
Is AMSOIL 5W-40 100% Synthetic ATV/UTV Motor Oil the right choice for a Can-Am Maverick X3?
Many Can-Am ATV and UTV models specify a SAE 5W-40 motor oil, and AMSOIL 5W-40 100% Synthetic ATV/UTV Motor Oil was formulated as a purpose-built alternative for Can-Am ATVs and UTVs that require a 5W-40. Cross-check the model year and engine in the owner manual against the AMSOIL vehicle lookup guide for the correct viscosity grade and oil capacity.
Is this oil wet-clutch compatible?
Yes. AMSOIL 5W-40 100% Synthetic ATV/UTV Motor Oil contains no friction modifiers and meets JASO MA/MA2 friction standards, so the formula supports positive wet-clutch engagement, smooth shifting and consistent clutch feel under load.
What is the recommended oil change interval?
Follow the original equipment manufacturer oil-change recommendation in the owner manual for normal and severe service. Severe service in an ATV or UTV typically includes deep mud, dust, sustained low-speed work, plowing, hauling and aggressive trail riding, all of which can shorten the recommended interval.
Can a different SAE grade like 10W-40 or 5W-50 be substituted?
No. The OEM-specified SAE viscosity grade is what the engine, oil pump, and clearances were designed around. Substituting a 10W-40, 5W-50 or 0W-50 in an engine that calls for a 5W-40 is not recommended. AMSOIL produces dedicated 10W-30, 10W-40, 5W-50 and 0W-50 powersports motor oils for the applications that specify those grades, all listed in the AMSOIL ATV and UTV oil guide.
Does using AMSOIL synthetic motor oil void a factory ATV or UTV warranty?
No. Using AMSOIL synthetic lubricants does not void a vehicle factory warranty. AMSOIL 5W-40 100% Synthetic ATV/UTV Motor Oil is Warranty Secure and backed by the AMSOIL Limited Warranty as a high-performance replacement for vehicle manufacturer-branded fluids.
Can AMSOIL 5W-40 100% Synthetic ATV/UTV Motor Oil be mixed with other motor oils?
The formula is compatible with other synthetic and conventional motor oils, but mixing shortens service life and reduces the performance benefits of the AMSOIL formula. Extended drain intervals are not supported when oils have been mixed, and aftermarket oil additives are not recommended.
