Short answer
Start with the sled’s manual. Two-stroke sleds need an oil meeting the listed standard, usually API TC or JASO FD, in the injection reservoir. Four-stroke sleds need the specified crankcase oil and viscosity. The chaincase or gearcase and the cooling system each have their own fluid. Choose each one separately.
2-stroke snowmobile oil
Most current two-stroke snowmobiles meter oil from a reservoir into the engine, so you never mix fuel by hand. The manual names the oil standard the system needs, commonly API TC or JASO FD, and sometimes the manufacturer’s own oil.
AMSOIL’s data bulletin lists INTERCEPTOR for two-stroke snowmobiles where API TC and JASO FD oils are specified, including direct-injected, electronic-fuel-injected and carbureted engines from Polaris, BRP/Ski-Doo (Rotax E-TEC) and Arctic Cat (C-TEC2). It is listed for use as injection oil or at 50:1 premix. DOMINATOR 2-Stroke Racing Oil is listed for high-performance stock or modified engines that require API TC oil, and not for alcohol or nitromethane fuels.
When you change oil brands or types in the reservoir, follow the sled manufacturer’s guidance, and keep the reservoir topped up so the pump never draws air.
| System | What to check | AMSOIL option to compare |
|---|---|---|
| Two-stroke engine | Oil standard in the manual (API TC, JASO FD) | INTERCEPTOR (AITQT); DOMINATOR 2-Stroke for high-performance engines |
| Four-stroke engine | Viscosity range and API/JASO standard | Formula 4-Stroke Powersports 0W-40 (AFFQT) |
| Chaincase or gearcase | Fluid type and fill level | Chaincase & Gear Oil (TCCCN) |
| Cooling system | Coolant chemistry and mixture | Powersports Antifreeze & Coolant (PSAFQT) |
Source: AMSOIL INTERCEPTOR data bulletin G1955.
Source: AMSOIL DOMINATOR 2-Stroke data bulletin G1985.
Ski-Doo, Polaris, Arctic Cat and Yamaha
Each sled maker sells its own oil line: XPS for Ski-Doo, VES for Polaris, APV for Arctic Cat and Yamalube for Yamaha. The owner’s manual also lists the standard the oil must meet, and that standard is what lets you compare other oils.
For Ski-Doo E-TEC, Polaris and Arctic Cat C-TEC2 two-strokes, check the manual for API TC or JASO FD; INTERCEPTOR’s bulletin lists those engines. For four-stroke sleds such as Ski-Doo ACE, Yamaha and Arctic Cat four-strokes, check the viscosity and API or JASO standard in the manual against the four-stroke oil’s bulletin.
4-stroke snowmobile oil
Four-stroke snowmobile engines use crankcase oil like an ATV or motorcycle. Use the viscosity range the manual allows for the temperatures you ride in, and its performance standard.
AMSOIL’s bulletin lists Formula 4-Stroke Powersports 0W-40 for powersports four-stroke engines and transmissions that require 0W-30, 0W-40, 5W-30, 5W-40, 10W-30 or 10W-40 oil and API SN (or an earlier API category) or JASO MA/MA2, including Ski-Doo, Arctic Cat, Polaris and Yamaha. Confirm your model’s specification before using it.
Source: AMSOIL Formula 4-Stroke Powersports data bulletin G1713.
Snowmobile chaincase oil and coolant
The chaincase or gearcase between the clutch and the track drive has its own fluid and fill level, and the manual lists both. Sleds with reverse may have a different requirement from those without, so check the manual for your exact model. Inspect the old fluid when you drain it: metal flakes or a burnt smell are worth investigating before the season.
Liquid-cooled sleds need the coolant chemistry and mixture strength the manufacturer specifies. Test or replace coolant on its schedule rather than by color, and check the heat exchangers under the tunnel for damage.
Before the first ride
Fill with fresh fuel of the octane the manual requires. Check the oil reservoir, chaincase level, coolant, belt, carbides and track tension. Grease suspension points that have fittings, using a grease suitable for wet, cold conditions.
If the trailer has been sitting, repack or grease its wheel bearings as its maker recommends. AMSOIL Synthetic Water-Resistant Grease is listed for components exposed to water, including boat trailers and powersports equipment.
Source: AMSOIL Synthetic Water-Resistant Grease.
Storing the sled in spring
Treat the fuel with a stabilizer and run the engine long enough to carry treated fuel through the system, or follow the manual if it calls for draining instead. Many fuel-injected two-strokes, including E-TEC models, have a manufacturer storage or fogging procedure; use it instead of a generic one.
For carbureted engines, a fogging oil coats internal surfaces against corrosion during storage. Change the chaincase fluid and, on four-strokes, the engine oil before storage so the sled sits with clean fluid.
Sources checked . Prices and product guidance may change.
Frequently asked questions
What oil does a Ski-Doo E-TEC use?
The manual lists the requirement; BRP sells XPS oil for it. AMSOIL’s INTERCEPTOR bulletin lists BRP/Ski-Doo Rotax E-TEC engines where API TC and JASO FD oils are specified.
Can I premix INTERCEPTOR instead of using the injection system?
AMSOIL lists INTERCEPTOR for injection or 50:1 premix (2.6 oz. per U.S. gallon). Do not disable or bypass an injection system unless the sled’s manufacturer provides a procedure for it.
Is snowmobile chaincase oil the same as engine oil?
No. The chaincase or gearcase has its own fluid requirement and fill level. Use what the manual specifies for that compartment.
Can I use 0W-40 in a 4-stroke snowmobile?
If the manual allows 0W-40 and the oil meets the listed API or JASO standard. Some four-stroke sleds share oil with other components; check before substituting an automotive oil.
General maintenance information. Always follow your vehicle or equipment manufacturer’s requirements and the current product data. Questions? Email [email protected].
