If you buy the quality stuff & if you are lucky it might raise it 7-10 points.
You just have to remember that equals .7 to 1.0 full octane rating improvement. I.E. 92 to 93 octane at best (using the larger bottles)
However if you have no need for this higher octane (high compression, advanced timing, forced induction, nitrous) it is a waste of money & likely will actually degrade performance as the fuel has less time to burn.
