Originally Posted by dbvettez061
I have a ZL1 Camaro which I'm sure would love 93-94 octane but in western Colorado the best I can get is 91. How can I increase up to 92-93 without creating any issues. Thx in advance.
As others have said, don't waste your money. What sets octane requirement is cylinder pressure just after ignition, where excessive pressure causes spontaneous ignition away from the existing flame front and before TDC. Being at high elevation reduces that pressure significantly, which is why they don't even bother offering 93 up there. Supercharging tends not to maintain pressure with elevation, either. Turbo vehicles might be able to use higher octane, but in a practical sense not so much... turbocharging (done right, the way OEMs do it) is less "octane hungry" than high static compression ratio, so even if the turbo causes the same cylinder pressure as it would at sea level, detonation is less likely.
Bottom line, you can try the snake oils... but don't expect to notice anything significant unless you use one that contains MMT... but then don't expect your O2 sensors to live long, either.