Octane deals with how much the gasoline can be compressed before it ignites from pressure. Certain high performance tuning configurations can require a higher octane which simply means they are running higher compression ratio's and need a fuel which can withstand this pressure.
Running a fuel which can withstand ultra-high pressure, while never subjecting the fuel to high pressure conditions, is a waste of money.
Notice my location.
Gas, HGH, it's all the same just put it in and hope for the best results