Ethanol doesn't wear parts faster, it actually reduces knock and dissolves the fuel deposits left behind by gasoline. It's the simplest fuel you can make since it can be distilled from any wine, beer, or spirit, and occurs naturally in all sorts of rotting plant matter. Prohibition couldn't stop the brewing of alcohol as it was simply too easy and accessible to everyone, so the government decided to place heavy restrictions on distilling instead, which put an end to making ethanol fuel at home. Of course this wasn't really an issue to most consumers at the time since gasoline was considerably cheaper and more available anyway.

Today nearly all cars with fuel injection can safely run ethanol blends up to E99 without replacing any lines or seals. The only difference between a regular car and a Flex Fuel car is that the Flex Fuel has additional injector mappings that activate when the O2 sensor detects running lean, so that it injects more fuel as required for these higher octane blends. Your car already adjusts the fuel trim to account for when gas stations change up the octane levels during summer and winter, you just need to add the mappings for blends up to 105 octane.

In any case, ethanol is locally produced in the U. S. of A., and unlike heavy crude it doesn't need to travel across the ocean before reaching your tank. Gasoline and diesel are going up in price primarily because most of our refineries are not built for the light crude that comes out of the Permian basin. There is no such problem with distilling ethanol, we have plenty of equipment and can easily convert existing breweries to meet the need.

Have a nice day.