1) Doesn't the USA have a mandate now such that ALL fuel has at least 10% Ethanol now? If that is not correct and you truly DO NOT have 10% Ethanol fuel in you Gas in AK then turf the chip...and be thankful...
2) Polaris say Pre-Mix 40:1 in the tank with their NON-VES oil, according to the owners manual...(their partly synthetic) for the first tank...
I however have never done this...When I first got the sled home I raised the rear-end and simply ran the motor till it warmed up and then shut her down. Repeated a couple of times over a few days. Then, I took it for a "break-in ride". I litterally rode, scrathers down, on loggin roads until I got the 2 hours burnt off the clock. My thumb just about fell off...I did not hold consistant RPM for a second....wap, wap, wap.
This is more than I have done for any other sled I have EVER owned.
Generally, I pick it up at the store, wap, wap wap up the road on the way to my first ride....then ride it like I stole it. Owned at least 7 brand new sleds...I've never had an issue...(dont know about the guys that bought them from me tho)
this is just one mans advice....I am sure smarter men will piss on this method