906UP
Well-Known Member
Lifetime Member
Supporting Member
Club Contributor
All of our snowmobiles are 4 strokes now, they run on recommended 89 all winter but I will fill them with premium, 91 or 93 (non-ethanol) depending on gas station, before we park them for the summer. The sleds sit for a lot longer than our ORVs..... 8 months or more.