I won't use ethanol blend in anything.
Just had a thought: If a motor needs to burn more E10 than straight fuel, does that mean a motor with a carby will run too lean? I mean a fixed carby like an older car or mower.
We had a Mazda E2000 light truck (Carby) where I work which we ran on E10. It had 2 engine failures within 20,000 Km. Not sure if it was the E10 or the fact that it was seriously underpowered and had to be thrashed pretty hard to keep up with other traffic.