Originally Posted by chester8420

All hogwash. Cars sold in the USA have been required for 20+ yrs to be compliant with fuels containing fairly high concentrations of ethanol. E-85 doesn't hurt any "newer" vehicle. Now if you go put it in a 70's vehicle, you might have problems. The only hardware problem you have to worry about when running the stuff is maintaining proper a/f ratio. Even acedic acid isn't a problem.

Originally Posted by Stealth

Gilbert, Az. elevation 1237 ft. 91 octane. Burleson, Tx. elevation 764 ft. 93 octane. Don't think it's the elevation. Not much of a difference.

Originally Posted by Several Websites

Octane ratings can vary greatly from region to region. For example, the minimum octane rating available in much of the United States is 87 AKI and the highest is 93. In the Rocky Mountain (high altitude) states, 85 octane is the minimum octane and 91 is the maximum octane available in fuel. The reason for this is that in higher-altitude areas, a typical combustion engine draws in less air per cycle due to the reduced density of the atmosphere. This directly translates to reduced absolute compression in the cylinder, therefore deterring knock.

Originally Posted by bluejay432000

Chester, I believe I would rather accept the knowledge of the Ford tech that told me this as well as what I have read on it. It doesent happen overnight, but it will dry out and deteriorate parts of the fuel system. That is why they tell you not to run the 85 fuel in anything except a flex fuel prepared system. You want to, fine. I won't.