I happened to be at a hardware store this AM buying a mower deck belt for my Cub Cadet. The guy ahead of me was bringing in a Stihl trimmer for service, and was complaining bitterly about the carburetor. He said that he had owned Stihl chainsaws, trimmers, etc. for years, and had always had good service from them, except lately he thought they had gone to "crummy" carburetors = he was going to switch to another brand. The guy behind the counter said that it made little difference what brand he switched to, as all of the 2-stroke motors used a carburetor from the same company, and that the problem was the gasoline that is sold around here (Northern Kentucky). He said that it is "reformulated" gasoline, and is a certain percentage alcohol. He said the alcohol eats up certain seals, etc. in the carbs. Is this true? Is this something we have to watch for?