Remember too that octane boost, for example like the 104+ really only boosts octane levels by maybe 3 points. 3 points meaning .3 not an actual 3, so 93 with the boost would only be 93.3. A waste of money if you ask me. Look into Tolulene, spelling and xylene they are good sources of octane and pump gas has these aromatics in it anyway. I was lucky and picked up on 2 55 gallon drums of Xylene for 100 dollars each, it has an octane level of 117 and I am pretty sure that is motor octane not research.