Lot's of questions about our fuel lately, here is a link to an article on the fuel additives. This was in the historic vehicle associations newsletter. I was reading the responses posted on the back end of the article, there was a link to a list of alcohol free gas stations, go to pure gas.org Mark
http://www.historicvehicle.org/Latest-News/October-2011/2011/10/31/Prevention-Gasohol-Fuel-Additives