I use 87 octane with unspecified amount of ethanol (hopefully less than 20%).
our gas is limited to 10% so far<> read the manual and see what gas you need, my new tractor says regular gas ,.old roto tiller reg. gas lawn mower reg. gas murray tractor reg. gas,. 29 hp. scooter high compresion, 89 oct. or 94 oct. O ethenal, 94 for winter storage,.