Is there a relatively simple way to remove ethanol from pump gas? I've read that fractional distillation is the way to do it but that assumes a known boiling point for the gasoline component, but this will vary if there are other additives in the fuel. I've also heard that the thing to do it add some water, thoroughly mix the fuels, then let the water settle out with the ethanol. I'm planning an experiment of the latter but I'm skeptical.

Alternatively, is there a particular brand or grade of fuel that is ethanol free (maybe high-test from a specific vendor)?

Thanks!