Quote Originally Posted by FoSHO99 View Post
You should be comparing E85 to race gas, a full size intercooler, meth setup, not 91/93 gas. It's a MINIMUM of 105 octane and gets to be about 109 full blend but has the characteristics to be very competitive with C16 when used wisely. E85 can replace a full size intercooler but comes with some drawbacks and that is it needs a bigger fuel system, gas mileage is reduced. Anyone who is running E85 and overly concerned with gas mileage shouldn't be running it all the time.

Without the 10-20% ethanol blend in regular/some premium gas the price of that fuel would go up 40-60 cents. It's used as an octane adder which would normally be toluene, trimeth and a few others. The problem is that those additives are very expensive, ethanol is less.

The main problem with ethanol is the misinformation.
105 when it's E79 or higher.

E70 (E68) is less though.