I have been running amsoil intercepter in my snowmobiles and my bike. I love the oil, and Amsoil says to mix at 50:1. I was going to do that until I talked to a couple of old timers that swear that if you do that you will fry the bottom end if you go leaner than 32:1, even if the spark plug is showing good color. I called Amsoil and talked to one of the Techs, and he assured me that it is safe to run 50:1. I ride from 6,500 ft to 10,000 ft here in western Wyoming so I need to be leaner because when I get on top of the mountains my bike has a hard time getting air. Any info would be great.