I've been reading some posts and replies this morning on roached pistons, ethanol, and fuel mixes. If the same person, (me), tunes the same saw with 16:1, 32:1, 40:1, or 50:1 mixture, is there really any difference? I was taught buy a Homelite mechanic in the 80's to rev the saw to full rpms and lean the high screw until it's screaming smooth, then open the screw back up until it glugs. I have a pile of saws, mower, hedge trimmer, weed wacker that are all 2 cycle engines. I use the same can of gas for the whole mess, 32:1. There is a Husqvarna 50 in the family that was purchased in 87, cut many cords of wood, still running today on the same piston, tuned at 32:1. I don't like the ethanol in fuel due to the effects on the fuel lines. It also seems to go bad extremely quick. However, where am I suppose to find fuel without alcohol? It will be a very cold day when I buy canned gas premixed for $24 a gallon. We have 87 and 89 octane at the pumps in this town, and I'm not sure of the 3rd rating at some stations because I've never bought it. Other than the fuel line problem and the shelf life, is the ethanol really a problem for homeowners like myself that cuts 3 cords of wood a year? I drain my saws and run them dry at the end of the season. I leave the fuel caps off for a week to let the rest evaporate.