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The catch is that only Premium fuel can be sold without ethanol.
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Do you know any more of the story on that, why it would be that only premium gas is ethanol free? In our area we typically fill up at Chevron, and within the last year all the pumps have sprouted stickers: all but the highest octane pump stickers say "may contain up to 10% ethanol", while the premium pump (the very highest octane selection only) declares that it is "ethanol free".
As far as I know, for the vast majority of regular compression engines higher octane gas is not needed, and the only reason to use higher octane, "premium" gas is to prevent pre-ignition, that is a factor with higher compression engines, typically used on a few sports and/or luxury cars.
With the advent of computer controlled fuel delivery, the waters get muddied though: if the car's computer detects pre-ignition somehow, it may retard timing. As a consequence, most any car can use regular gas, albeit with the possibility of retarded ignition timing, to compensate.
Purely my opinion: there are way too many higher octane offerings/choices, considering the number of cars actually requiring the stuff, at least according to what the Owners Manuals say. Also, I
know I'm a bit out-of-my depth, not really knowledgable on the subject, just some thoughts.
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