Re: Regular v premium
I've done tons of reading on this and the safe bet everyone recommends is between 25:1 and 32:1. I wouldn't go below 20:1 after break in. I run 32:1. The general trend with these engines is that they aren't very picky about things. Spark plug gaps can vary largely and still work, standard or premium gas works, 18:1 to 40:1 would still work and probably be a safe range.