Any fuel mixture that exceeds 95-98 octane is a waste of money. These are 10:1 (approx) engines, they can not burn the fuel off through combustion. Secondly if your exhaust is glowing I suggest you have someone that knows what they are doing look at the car, you are about to cook an expensive motor. I suggest the valves be adjusted, compression check, leak down and have the timing adjusted and set properly. The motor is so expensive, it would be a shame to damage it.