What chemicals are in race gas, the 108 octane VP four stroke stuff? I think I am addicted to it I love the way it smells, but the price rediculous! $26 a gallon. Anyone have a link that shows the properties and such? Another thread a guy says add up 30% xylene to regular gasoline Sorry but I am no guinea pig, would spend the $26 a gallon before trusting someones undocumented reccomendations!