So Santa delivered a Beta Evo 250 this am. I am new to this. 1) I heard from folks who introduced me to trials last month that they use high octane gas, like aviation fuel. I don't have easy access to aviation fuel. a- Will super unleaded no ethanol be OK? b- What if it has ethanol? 2) Manual calls for 4% mineral, 1.5% synthetic for the fuel mix. a- I assume this is "either or" rather than "both and." b- which of the two is better? Thank you for the advice.