I switched back to 91 octane and am driving the car everyday now. it's nice to get better gas mileage on the highway. I did pulley up to a 3.2 pulley and am running 15* of timing with no kr. another thing I'm enjoying is the lack of water/methanol that is being used while going wot. I had it set to start spraying at 10 psi of boost and go max spray at 12, that was when the car was making 12 psi of boost with a 3.0" pulley. now the car makes 10 psi of boost at max load, thus not much w/m is being used.