Same here in Minnesota, our state requires %'s of ethanol depending on season in all gas 87-92 the only exception is farm fuel which is what I use and only cause I'm in the sticks and its available. The only draw back from ethanol would be the loss of energy that it produces when mixed in fuel but we would not be seen in our engines. If you take a tank of ethanol fuel and a tank of regular fuel and take a trip you will get less mileage (energy) from the ethanol blend vs the non ethanol blend (up to 30% less using E-85 fuel). Ethanol is used for one reason "To lower emissions" but there are two sides to that coin. Also remember octane is not the amount of energy you will get from the fuel but the measurement of a gasoline’s resistance to pinging or knocking under a certain compression, if your motor cannot get the amount of compression compared to the octanes then the extra energy is waisted out the tail pipe. In other words if your motor cannot get to the higher compression then you will get the same energy out of either 87-92 but may get better gas mileage in a large vehicle due to the additives. Ethanol will condensate or attract moisture (separate) faster then regular fuel as well, but it will take quite a while for it to happen. And as with any fuel I would recommend shaking the oil/fuel mix before using it - Always.In WI you can't find anything but 10% ethanol mix. It's all they sell.
I have been safely running 87 octane regular gas with 10% ethanol for over a year in these trucks and have had ZERO issues.
BTW the higher octane does nothing for these low compression two strokes. Lower octane burns slower, so a lot of heat is pushed out the exhaust in these engines, thus over heating the exhaust ports.
There is zero reason to use anything but 87 octane regular.