Out in the People's Republic of California where gas is highly regulated (and oxygenated) I average around 17MPG city and have never got much more than 25MPG on the highway.

Could never quite figure how we are saving in air polution if we have to use more gasoline in the end. Its sorta like buying a 10 ounce tub of "whipped" butter rathern than a real pound.

BTW for something claimed to be 91 out here, it is over $4.19 a gallon and rising....daily!