I have a 2012 Pro 800 with stage II SLP installed. My main sledding area is 8000 to 10000 feet. I was told that at that altitude I could run the non Ethanol plug since the controller runs rich. I tried it yesterday and saw a 300 RPM increase in performance and no negative results except a little more fuel usage. My question what is what happens if you run it that way all the time? What should I look for? Thanks for the information.