Well, just got back from Florida, and discovered some interesting thins about ethanol in the fuel. I ran through 3 states where they were selling ethanol free fuel, and gas seemed to be cheaper witho...
I'm not all that fond of the ethanol in the fuel. It does serve as an octane booster-at least one way to boost octane.
But... ethanol contains about 30 percent less energy per gallon than gasoline. The fuel generally contains 10% ethanol. So the total energy content of the ethanol treated gasoline is about 3% less than pure gasoline. You report a 22% plus loss of fuel economy-which is far beyond the scope of the ethanol. I suspect headwinds/tailwinds are a big factor here.