I need to run Premium in both Acuras (the TSX for sure due to factory design, and the Integra due to mods -- the fuel savings outweigh the upcharge). Not having that efficiency reduction with ethanol would be nice. (I wonder what they do for Winter blends???)
Anyway,
pure-gas.org has a listing of non-Ethanol fuel stations available by State, with the option to add new locations -- and looks to be legit.
Note that some States do not require Ethanol labeling (including my home area of Missouri and Kansas -- so self testing would have to occur). The Site gives details and instructions for the entire determination process.
Best FE,
-RH77