If you buy Stihl premixed gas it is ethanol free premium. There is not a maker of 2 cycle engines that I know that prefers you to use ethanol blends.
STIHL MotoMixョ - Premixed Fuel - YouTube
I did see that fuel but the tiller eats gas. It would of cost me $45.00+ to use it for one short day! $6.99 quart!