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    In the US, is it easy to find less than 10% ethanol premium gas

    Hey all, I'm about to do a 3000 mile trip in the US. I'm from Canada, and here most of the premium 91 octane or more gas is ethanol free. In the US, how easy is it to find 91+ octane gas that has less than 10% ethanol? My dealer told me that my warranty would be void if I used greater than 10%...