Formula 4-Stroke® 0W-40 or 10W-40 ATV/UTV?

Formula 4-Stroke® 0W-40 is the default in the 907. It is a true 0W-40 that replaces a stack of viscosities and starts when a 10W-40 is still thick. Use the 10W-40 ATV/UTV oil when the owner’s manual specifically requires 10W-40 ATV/UTV oil and you do not want to substitute a 0W grade.

Are these wet-clutch compatible?

Yes. Both are built without friction modifiers. Formula 4-Stroke® 0W-40 meets JASO MA/MA2. The 10W-40 ATV/UTV oil meets JASO MA. Shared-sump ATVs that wet the clutch in engine oil need this chemistry — not Signature Series from the truck.

Will it replace Polaris PS-4, Can-Am XPS, or Honda GN4?

Formula 4-Stroke® 0W-40 is recommended as a replacement for Polaris Synthetic PS-4 Plus and Arctic Cat ACX, and it covers applications that call 0W-30 through 10W-40. The 10W-40 ATV/UTV oil is the 10W-40 alternative for Kawasaki, Suzuki, Can-Am, Honda, Yamaha, Kubota, and John Deere that spec that grade. Confirm year and model on the lookup.

Does AMSOIL void my ATV or UTV warranty?

No. Both oils meet the API and JASO specs the manufacturer lists. Magnuson-Moss bars a brand from requiring their oil unless they give it to you free. Keep receipts and run the listed viscosity.

What goes in the differentials?

Not these bottles. Front and rear diffs take a gear lube — SEVERE GEAR® 75W-90 is the usual call. Honda Foreman/Rancher gearcases have their own fluid. The ATV lookup lists engine, gearcase, and filter together.

Green ATV on a gravel trail at dusk, snow-covered spruce behind it

ATV · UTV

Formula 4-Stroke® 0W-40 and 10W-40 ATV/UTV. The two bottles a 907 four-wheeler actually needs.

Formula 4-Stroke® 0W-40 for cold starts and most machines. 10W-40 ATV/UTV when the manual is specific. Wet clutch, shared sump, Wasilla dealer.

Shop Formula 4-Stroke® 0W-40 Shop 10W-40 ATV/UTV

Video · 2:22

Watch: AMSOIL ATV/UTV oil proof of performance

AMSOIL logged trail-riding, hauling and work data from three demanding machines, built harder dyno cycles from it, ran a full oil-change interval, then inspected each machine.

Video: AMSOIL INC. · Plays from YouTube when you press play.

The two that sell

One for Alaska mornings. One for a 10W-40 spec.

Fredric Riech specs Formula 4-Stroke® 0W-40 for almost every four-stroke ATV and UTV that rolls through the Mat-Su. The 10W-40 ATV/UTV oil is the exact 10W-40 when the book will not take a 0W. Same dealer number either way: 1245102.

AMSOIL Formula 4-Stroke® Powersports 0W-40 synthetic motor oil quart bottle

ATV · UTV · 4-stroke sled

Formula 4-Stroke® 0W-40

The Alaska bottle. A 0W that still cranks at twenty below, and a 40-weight film for a loaded Ranger on a July trail. Replaces 0W-30 through 10W-40 in most four-stroke machines.

Pour: −58°F
Grade: 0W-40
Spec: JASO MA2

−58°F pour point — the 0W winter number most ATV oils do not have
Wet-clutch compatible: JASO MA/MA2, no friction modifiers
Replaces 0W-30, 0W-40, 5W-30, 5W-40, 10W-30, and 10W-40
Polaris PS-4 Plus and Arctic Cat ACX replacement
ATVs, UTVs, and four-stroke snowmobiles from one quart

Best for: Polaris, Honda, Yamaha, Can-Am, Suzuki, Kawasaki, Arctic Cat

Shop Formula 4-Stroke® 0W-40

AMSOIL 10W-40 100% Synthetic ATV/UTV Motor Oil quart bottle

Severe service · 10W-40 spec

10W-40 ATV/UTV

Purpose-built for ATVs and UTVs that spec 10W-40 — Kawasaki, Suzuki, Can-Am, Honda, Yamaha, Kubota, John Deere. Stay-in-grade chemistry for hauling, plowing, and shrouded-engine heat.

Pour: −40°F
Grade: 10W-40
Spec: JASO MA

Severe-service formula for work machines and modified rigs
Consistent clutch feel — resists slip, fade, and chatter
Cools shrouded engines under roofs, doors, and winch kits
API SL and JASO MA wet-clutch spec
Follow the OEM drain; this is not the 0W winter substitute

Best for: Machines whose manual calls 10W-40 ATV/UTV oil

Shop 10W-40 ATV/UTV

How we spec a 907 four-wheeler

CompareFormula 4-Stroke® 0W-4010W-40 ATV/UTV

Best for

Most 4-stroke ATV/UTV + sleds

When the book says 10W-40

Viscosity

0W-40 (replaces several grades)

10W-40 only

Pour point

−58°F

−40°F

Clutch spec

JASO MA/MA2

JASO MA

The 907 call

Default for Alaska cold starts

Exact 10W-40 OEM spec

Unsure? Call (907) 350-7366 with year, make, and engine. Fredric will put the right quart in the cart — including gear lube for the diffs.

Look up the machine

Polaris, Can-Am, Honda, Yamaha — year and model.

AMSOIL.com lookups for ATVs, UTVs, and personal watercraft, tagged to dealer 1245102. Engine oil, gearcase, and filter in one screen. Opens in the store so Preferred Customer pricing follows you.

ATV lookup UTV lookup Personal watercraft Wholesale pricing

UTV / ATV oil change kits

Oil change kits for Polaris and Can-Am

AMSOIL boxes the oil, filter, and washer or O-rings for one change. The Polaris kits (PK1–PK4) use 5W-50 Synthetic ATV/UTV Motor Oil and the Can-Am kits (CK4–CK6) use 5W-40. Each has its own page with AMSOIL’s full fitment list.

Polaris · PK1–PK4

AMSOIL Polaris oil change kits

PK1 for the ACE 900, GENERAL 1000, and 2013-and-newer RANGER and RZR 900 & 1000; PK2, PK3, and PK4 for the rest of the listed Polaris line, including the RZR 1000 Turbo. Fitment table by model.

Polaris kit fitment

Can-Am · CK4–CK6

AMSOIL Can-Am oil change kits

CK4 for the Maverick X3 family, CK5 for most Outlander, Renegade, Commander, Maverick, and Defender HD8/HD10, CK6 for the HD5 and Outlander 400/450. Fitment table by model and year.

Can-Am kit fitment

Towing the wheeler? Check the trailer bearings too

The trailer that hauls your wheeler all summer becomes the snowmachine hauler all winter. Before the first sled trip, run the driveway bearing check in our guide to repacking your trailer bearings before snowmachine season — spin, listen, play, and heat on every wheel.