John,<br /><br />Depends on where you live.<br /><br />To answer your question-NONE. It just depends on the amount of alcohol and the type, depending, again, on where you live.
Some of the major brand stations will have alcohol percentages posted on the pumps.How often they update their recipe and conform to the pump info is anyones guess.Gasoline is one of the few products that sells for near 2 bucks a gallon and consumers rarely get to visually see or test what their paying for before it goes in their tanks.