Introducing ethanol into motor fuels was only good for the corn producing states. It had nothing to do with pollution or increasing fuel mileage. Matter of fact. it increases pollution because you have to burn more fuel for the same number of btu's, and reduces mileage. Ethanol was all abougt money, the same as MTBE. With MTBE it was a poisonous byproduct of gasoline production, later shipped to and stored in Canada, and sold back to the fuel manufacturers as an "oxygenator". When it was outlawed it became a political "hot potato" because of NAFTA regulations which brought some serious financial penalties into play from the termination of MTBE use.

Every time California has re-formulated the gasoline based fuels for motor vehicles there has been a rash of engine compartment fires amongst older vehicles. Each formulation has caused the latest, greatest fix from the last time to melt away. Get used to it folks. There's no rhyme or reason to what's being done with gas formulas other than locating additional profit centers. What happens to your vehicle or other engine powered appliance is purely secondary, and of little consequence to the manufacturers.