A friend who just retired as a mechanic from a Polaris dealership told me to run my Polaris sleds in 87 mode all the time irregardless of fuel I think I am putting in.  Mixups happen in fuel tanks and you always get a little ethanol in the fuel hose on the multi select pumps.  Does it make a difference?   He told me many of the high mileage untouched engines were ran in 87 mode all the time.   Personally I have ran my sleds in 87 and 91 mode.  I run in 87 mode with guys in 91 mode who use additives to treat ethanol, not sure what they add, but I don’t see much if any difference in their sleds performance and I highly doubt 98% would actually notice a difference.  other then the psychological thought your faster.  Kind of like adding a can.        

When were you last there?  Been lots of complaints about lousy trail access to super 8 last few years. Next time I was thinking of trying cedar meadows.  last time I stayed at Bonaire, that was 2019. Heard that trail no longer there either. 

The Westway in Cochrane but book well ahead. Its sledders headquarters. Timmies right across the street and restaurants closeby. We like the Super 8  in Timmins as they have a Caseys right beside them and easy access by trail. They have a hot breakfast included.  Beer and gas are closeby to.

Ran our bay today, seemed plenty solid 😕 Calling for a bunch of snow tomorrow I believe.

The ethanol setting increses fuel curve and retards timing.