[Formulabruce]

Ethanol Alcohol will eat your carb fuel pump, your mechanical fuel pump, and other gaskets in the carb.
Newer cars for flex are equipped to run this, HOWEVER
Look at a window sticker on a new truck ( take the 5.3)
Cruising range ...................380 miles
Cruising range on E-85.........218 miles
The more alcohol, the worse fuel economy, even though it has more base octane rating, its piss poor in the mass density dept.
Also E85 costs over 1 dollar MORE per Gallon to make, than it sells for ( subsidy.. federal taxes pay that)
E15 is over the limit on what "most" car fuel pumps/systems can handle and put a new kind of corrosion in your engine.
Fix? none. Its a money pit, pay taxes to subsidize, and pay for additives and pay for retrofits. While Volcanoes blow off more debris than any country could in 200 years, in One Day!
The EPA was given, by the Senate 3 years ago, the Complete power to implement and make more regs dating back to 1973.
Expect to see more "dreamy" ideas.. only fix is to complain to your reps...