It may also be a national mandate. Check out the content of any Premium 91 octane fuel in your area, if you are looking for Ethanol free fuel. I have to run it in my high performance 400 hp. 26’ aft-cabin cruiser,(Imagine the cost of replacing that engine!) also my snowblower/lawn tractor and all my small engines. I have had excellent results and no problems. (My toys are way too costly to risk and I refuse to pay for the damage that running Ethanol fuels would cause.)
It is easier for me to check the gas before I use in in any engines I have. I don’t have to rely on a station telling the truth about the Ethanol in the gas. If the tests show that mess, I will not use it and I will scratch that station off my list. [:0)