That's a good point, but luckily there are TONS of info out there on where the best places to buy E85 locally, at least here anyway. A few of the forums Im on have ongoing e85 threads with up to date testing(the test kits are very cheap, by the way. I want to say under $20)and everything, labelling the station, price, ethanol content/etc....
Maybe it's different here in CO, but I havent seen anyone have any problems on E85 out here, other than fuel economy and so-on. AND, out here 95% of tuners recommend it over even racegas...
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-Jake