I don't know, maybe my car is different, maybe it's just the 14* initial timing, but my car practically won't run on anything but 93 or better. I've loaned it to a buddy and he put 87 or 89 in it and i get it back and it's sputtering and bucking until i run the gas out and put premium in it.
On the flip side to that, i've tried to run race gas and saw absolutely no gains so i think somewhere around '93 is optimal for how my engine is tuned.
On the flip side to that, i've tried to run race gas and saw absolutely no gains so i think somewhere around '93 is optimal for how my engine is tuned.