Horse 123, if you are buying 89 octane in MN, it has 10% ethanol. Only Premium 91 octane is sold and labeled as non-oxygenated fuel here, and only at some gas stations. The pump, by law, has a large white label telling you its only for use in collector cars, watercraft, atv's and other OPE equipment. Nobody polices what it gets used in, but the labels will be there if its non-oxy in MN - it helps justify the much higher selling price...
In terms of ethanol being good or bad, I'll just state I feel its bad policy, but its here (and has been for a long time for some of us).