Which would be best to put in my tank? I'm thinking regular with 10% is the right choice. But I don't want high octane, but it has no alcohol. I really don't know. Why are they putting alcohol in gas anyway, it is heavily subsidized, uses food crops and is NOT the better environmental choice as it requires more energy to make than to produce gas. Is gasahol bad for a little 2 stroke? Anyone else have to type around cats?