yeah in my area the only options are 93 and 100 for high octane so i guess i could do 50/50 and split the difference rightYes you can run 100+ octane in your MS6 provided it is not leaded gasoline. From my own personal experience 95ish octane is where the sweet spot is in throttle response/timing advance/SOTP feel.
You don't need to rebuild an engine to receive any benefits from high octane fuel, especially in a forced-induction application. At minimum, running 100 octane will just cost more and add a little extra insurance against detonation.Yes you can but there's no need to unless you rebuilt your engine.
Racing cars run 100 octane. FYI