Av gas
I have an 08 M8 Boondockers race gas, my boost actuator is a minimum of 13lbs, so I pretty much just run it on that minimum all the time, and its the most fun I've ever had. Anyway, I run straight av gas all the time, no sign of det, nice golden brown plugs and pistons... However, I run 8000ft++ in elevation. I will NEVER buy race gas again unless I'm trying to run 15lbs at lower elevation, then its probably going to have to be some 112++. I've had two different M8 Turbos, ran them both with 100LL and never a problem... I even turned one of them up to 17lbs at 9,000ft. Didn't keep her there for long cause I was chicken, but no problems with that either...