Typically the older engines all wanted regular gas (from what I've observed). But it depends on your sled. The manual, gas cap, and dealer for my 900 Fusion stated a recommendation of 91 octane. So that's what I burn. I tried regular once (needed enough gas to get to the station), and it was the same as if I had bad plugs in and the engine couldn't fire properly. However, we have a good system here for supreme gas. On certain days, it's only 3 cents more than regular, you get triple points anytime, and double gas coupons anytime. So it ends up being 6 cents per litre cheaper than regular to pump supreme in my snowmobile instead of regular. Go figure
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