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AUTHORIZED DEALERPowersports — Snowmobile
INTERCEPTOR & DOMINATOR 2-stroke oil for E-TEC, CleanFire, Patriot, and C-TEC2. Formula 4-Stroke for Yamaha Sidewinder and Apex. Synthetic chaincase, Shock Therapy suspension fluid, powersports coolant, water-resistant grease, and fuel stabilizers — engineered for the cold, the load, and the long off-season.
2-Stroke Oil
AMSOIL synthetic 2-stroke oils for direct-injection (E-TEC, SDI, CleanFire) and traditional injection or premix snowmobiles. Engineered to fight ring sticking, exhaust valve deposits, and piston scuffing under sustained cold-weather, full-throttle running.
The premium choice for modern direct-injection snowmobile engines — Ski-Doo E-TEC, Polaris CleanFire/Patriot, Arctic Cat C-TEC2 and SDI, Yamaha. Outstanding ring-sticking and exhaust valve deposit control with low-smoke, low-odor performance.
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Ultra-premium 2-stroke racing oil for snocross, hill-climb, and high-output modified sleds. Maximum film strength and anti-scuff protection at race-engine temperatures and RPM. Excellent in injection or premix.
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Synthetic 2-stroke oil engineered for traditional oil-injection snowmobiles, outboards, and powersports engines. Reduces smoke and deposits while delivering the protection of a true synthetic at a lower price point than INTERCEPTOR.
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4-Stroke
Wet-clutch certified 4-stroke synthetic for Yamaha Sidewinder, SR Viper, Apex, Polaris ProStar 4-stroke, and Arctic Cat ZR 9000 (Yamaha-built) snowmobiles. Built to handle turbocharged heat and sustained high-RPM operation.
All-season 0W-40 synthetic powersports oil with outstanding cold-flow and high-temperature film strength. Ideal for Yamaha Sidewinder/Apex turbo and naturally aspirated 4-stroke sleds. Wet-clutch certified for shared sumps.
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Heavy-duty 0W-50 synthetic powersports oil for high-output 4-stroke applications that call for a thicker high-temperature viscosity. Excellent shear stability under sustained load and heat.
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Chaincase
Synthetic chaincase oil engineered for the unique demands of snowmobile chaincase and gear drive — extreme cold viscosity at startup, anti-wear protection at sustained trail speed, and corrosion control through the off-season.
Premium synthetic chaincase oil for Ski-Doo, Polaris, Arctic Cat, and Yamaha snowmobiles. Excellent low-temperature flow on cold mornings, outstanding anti-wear at trail-speed load, and rust protection during summer storage. Also covers many ATV gear drives and small gear cases.
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Suspension
Shock Therapy synthetic suspension fluid for snowmobile shocks and forks. Shear-stable, consistent damping cycle after cycle — even in deep cold. Match the OEM-specified weight from Fox, KYB, Walker Evans, or other shock manufacturers.
#5 weight synthetic suspension fluid for snowmobile shocks and forks calling for a light damping fluid. Consistent valving response across a wide temperature range, including bitter cold operating temps.
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#10 medium weight synthetic suspension fluid for snowmobile shocks specifying a heavier damping oil. Maintains consistent damping under the high cycle counts of trail and mountain riding.
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Antifreeze
Pre-mixed propylene-glycol-based powersports coolant engineered for the small cooling systems and heat-exchanger designs of modern 4-stroke snowmobiles, ATVs, UTVs, and motorcycles.
Pre-mixed, ready-to-use propylene glycol coolant. Excellent corrosion protection for aluminum, copper, brass, steel, cast iron, and solder. Lower toxicity than ethylene-glycol coolants and biodegradable.
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Grease
Water-resistant synthetic grease for snowmobile suspension pivots, ski spindles, jackshaft bearings, and any chassis grease point exposed to snow, ice, and meltwater.
Lithium-complex synthetic grease engineered to resist water washout and protect bearings, pivots, and chassis points exposed to snow, slush, and constant moisture. Excellent low-temperature mobility for cold-weather sled service.
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Fuel & Additives
Protect 2-stroke and 4-stroke fuel systems from ethanol-blend gasoline through long off-seasons. Quickshot and Gasoline Stabilizer keep fuel fresh and the system clean; DOMINATOR Octane Boost adds 4 octane points for high-output and modified sleds.
Restores peak performance in small engines and powersports fuel systems plagued by ethanol-blend issues. Cleans injectors and combustion chambers, stabilizes fuel for short-term storage, and helps prevent phase separation.
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Long-term fuel stabilizer for snowmobiles, lawn equipment, generators, and seasonal powersports. Keeps gasoline fresh up to 12 months, prevents gum and varnish in carburetors and injectors during off-season storage.
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Adds up to 4 octane numbers — fight detonation in high-compression, turbocharged, or modified snowmobile engines. Excellent for race fuel blending and high-altitude mountain riding where pump-gas octane drops.
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Penetrating fogging oil protects internal engine components from corrosion during off-season storage. Critical for 2-stroke and 4-stroke snowmobiles parked between seasons in humid Florida or Gulf-Coast climates.
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Cleaners
Round out a full sled service with AMSOIL Mudslinger to repel snow and grime, Power Foam to clean carburetors and intake tracts, MP Metal Protector for chassis and electrical contacts, and Brake & Parts Cleaner for clean assembly.
Sprays on, dries to a slick polymer barrier that prevents snow, ice, slush, and mud from sticking to plastics, tunnels, A-arms, and skid frames. Easier post-ride cleanup and less weight from packed snow.
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Foam carb and intake cleaner — dissolves gum, varnish, and carbon deposits in carburetors, throttle bodies, and intake runners. Useful at season start-up for sleds parked over the summer.
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Penetrating lubricant and corrosion inhibitor for hinges, latches, throttle cables, and electrical connectors. Helps prevent rust and seizing on snowmobile chassis hardware exposed to salt, snow, and meltwater.
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Thicker, longer-lasting corrosion inhibitor — perfect for off-season sled storage, trailers, and chassis components in coastal or humid environments.
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Fast-drying, residue-free brake and parts cleaner. Removes oil, grease, brake dust, and contamination from snowmobile brake rotors, calipers, and chassis components before lubrication or assembly.
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Find Your Fluid
Match your sled to the recommended AMSOIL engine oil and supporting fluids. For the exact part number for your year and model, use the official AMSOIL snowmobile lookup or contact Eric Riley.
| Sled | Engine Oil | Chaincase / Suspension | Notes |
|---|---|---|---|
| Ski-Doo MXZ / Renegade / Summit (E-TEC 600/850) | INTERCEPTOR (AIT) 2-stroke | TCC chaincase · STL/STM shock | Direct-injection |
| Ski-Doo Backcountry / Freeride 850 E-TEC Turbo R | INTERCEPTOR (AIT) — race option DOMINATOR (TDR) | TCC · STM medium shock | Turbocharged DI |
| Polaris Indy / Switchback / RMK (CleanFire 600/800) | INTERCEPTOR (AIT) 2-stroke | TCC chaincase · STL/STM shock | Direct-injection |
| Polaris Patriot Boost / Patriot 9R | INTERCEPTOR (AIT) — race DOMINATOR (TDR) | TCC · STM medium shock | Turbocharged |
| Arctic Cat Riot / ZR / M (C-TEC2 600/800) | INTERCEPTOR (AIT) 2-stroke | TCC chaincase · STL/STM shock | Direct-injection |
| Arctic Cat ZR 9000 Thundercat (Yamaha-built turbo) | Formula 4-Stroke 0W-40 (AFF) | TCC · STM medium shock | 4-stroke turbo |
| Yamaha Sidewinder L-TX / SR Viper (turbo) | Formula 4-Stroke 0W-40 (AFF) | TCC · STM medium shock | 4-stroke turbo |
| Yamaha Apex / Vector / Phazer (4-stroke) | Formula 4-Stroke 0W-40 (AFF) | TCC · STL light shock | 4-stroke naturally aspirated |
| Older 2-stroke (carbureted, premix) | DOMINATOR (TDR) or Injector Oil (AIO) | TCC chaincase · STL light | Carb / premix legacy sleds |
| Race / modified 2-stroke | DOMINATOR (TDR) + Octane Boost (AOB) | TCC · STM medium shock | High-output, hill-climb, snocross |
Selector is a quick reference. Always confirm the correct viscosity and fluid spec using the AMSOIL vehicle lookup or your owner's manual.
Compare
Three synthetic 2-stroke oils — pick by engine type and use case.
| AMSOIL 2-Stroke Oil | Best For | Engine Type | Spec |
|---|---|---|---|
| INTERCEPTOR (AIT) | Modern direct-injection sleds, low-smoke, low-odor | E-TEC, CleanFire, Patriot, C-TEC2, SDI | JASO FD · API TC |
| DOMINATOR (TDR) | Race, snocross, hill-climb, modified, turbo | Premix or injection, high-output 2-stroke | JASO FD · API TC+ |
| Synthetic 2-Stroke Injector Oil (AIO) | Traditional injection sleds, value-priced synthetic | Conventional oil-injection 2-stroke | JASO FD · API TC |
Modern snowmobiles — Ski-Doo MXZ and Summit, Polaris Indy and RMK, Arctic Cat Riot and M, Yamaha Sidewinder and Apex — push 2-stroke and 4-stroke engines into operating envelopes that conventional oils were never built for. Direct-injection 2-strokes (Ski-Doo E-TEC, Polaris CleanFire and Patriot, Arctic Cat C-TEC2) demand a clean-burning synthetic with exceptional ring-stick and exhaust-valve deposit control. Turbocharged 4-strokes like the Yamaha Sidewinder and Arctic Cat ZR 9000 demand a wet-clutch certified, turbo-rated oil that holds film strength at sustained high RPM and heat. AMSOIL builds purpose-engineered synthetics for both.
AMSOIL INTERCEPTOR (AITQT-EA) is the right choice for nearly every modern direct-injection 2-stroke snowmobile. It controls exhaust valve deposits — the #1 killer of E-TEC, CleanFire, Patriot, and C-TEC2 power output — while running clean, low-smoke, and low-odor. AMSOIL DOMINATOR (TDRQT-EA) is the ultra-premium racing oil for snocross, hill-climb, mountain turbo, and modified sleds where maximum film strength and anti-scuff protection take priority. AMSOIL Synthetic 2-Stroke Injector Oil (AIOQT-EA) is the value-priced synthetic for traditional injection sleds that don't have the precise spray patterns of modern DI engines.
Yamaha-built 4-stroke snowmobiles — including the turbocharged Sidewinder and Arctic Cat ZR 9000 Thundercat — typically specify a 0W-40 wet-clutch certified powersports oil. AMSOIL Formula 4-Stroke Powersports 0W-40 (AFFQT-EA) is engineered for exactly this duty: cold-start flow at sub-zero temperatures, sustained high-RPM film strength, turbo-rated thermal stability, and JASO MA/MA2 wet-clutch certification. For naturally aspirated Apex, Vector, and Phazer engines, the same Formula 4-Stroke 0W-40 covers the application.
AMSOIL Synthetic Chaincase & Gear Oil (TCCCN-EA) is the right call for every Ski-Doo, Polaris, Arctic Cat, and Yamaha chaincase — synthetic base for cold-start flow, anti-wear additives for sustained trail-speed protection, and corrosion control through summer storage. Shock Therapy #5 Light (STLQT-EA) and #10 Medium (STMQT-EA) cover Fox, KYB, and Walker Evans shock service across the major sled brands. Powersports Antifreeze (PSAFQT-EA) is pre-mixed propylene-glycol — aluminum-safe, lower toxicity than ethylene glycol, and perfect for the heat-exchanger cooling systems on modern 4-stroke sleds.
For Florida and Gulf-Coast sled owners storing a snowmobile through long, humid summers — or any rider with a 6+ month off-season — proper storage is the difference between a sled that fires on the first pull and one that needs a top-end rebuild. Run a final tank with Gasoline Stabilizer (ASTCN-EA), fog the cylinders with Engine Fogging Oil (FOGSC-EA), grease every chassis point with Synthetic Water-Resistant Grease (GWRCR-EA), and protect exposed metal with MP Metal Protector (AMPSC-EA) or Heavy-Duty Metal Protector (AMHSC-EA).
1stSynthetic.com is run by Eric Riley, an Independent AMSOIL Dealer based in Dade City, Florida. We serve snowbird sled owners, riders trailering north to the snow belt, and customers throughout the United States — including the major sled markets of Michigan, Minnesota, Wisconsin, New York, New Hampshire, Maine, Vermont, Idaho, Montana, Colorado, and Utah. Order online and ship direct from the AMSOIL distribution center, or join the Preferred Customer program to save 25% on every snowmobile order, every time.
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