because of recent gas prices I was wondering what types of mods you would need to 'safely' run midgrade gas. I know that with other supporting mods you can run a smaller pulley because you're less likely to get KR, so, wouldn't that mean if you do mods just to reduce KR then you could run lower octane gas? 93 octane here is around $2.09 a gallon, midgrade is around $1.90. In the long run that difference would add up to quite a nice chunk of change. I'm tempted just to try it, I don't run the car hard enough to ever really use the supercharger anyway. I should get a boost gauge to make sure. Has anyone ran their car on an autotap to see if they get a lot of KR with midgrade and light mods?

id just bite the bullet and put nothing less that 91 in it.

I'm NA, and I won't run less than 90. I run 93 if I can get it. The advantages (I can actually feel the difference) are worth the couple of extra buck per tank for me.

Intercooler

Mos you can't feel a difference.... If you can, you need to fix something Have someone else fill her up and then tell me what you feel.

$2.09 a gallon!!! Wow! Where are you located in MI? It was only $1.78 this morning at Amoco in Flint for midgrade! I didn't pay much attention to premium. It couldn't have been much more than $1.90, though.