There is one that actually works, but it's very hard to find. It's called Torco race fuel accelerator, I only found out relatively recently that some of the old school turbo dodge guys have been using it for a while. Pricey, at maybe $80 for a six can case, each can will make each tank good for Stage 2 High Octane Mode.

But as PSIchick said, unless you have Stage 2 or 3R(come'on baby!!!!), or are upping the boost to levels where you need fuel management, theres not any gain to be had.

the trick with the autoparts stuff is the "points" We want each point to be a whole number
93 + 3points = 96
But, sadly, it's not like that
93 + 3 points = 93.3 is the real math.

 

I go to Shell or Mobil....i dont have much of a choice unless i want to pay for my own gas, those are the only 2 places my parents have credit cards at.

 

i added like 3 gal of 104 at the track to my 1/4 tank of 93 last time i was there...it loved it!

 

glhs837 is totally correct. Those numbers on the bottles are very misleading. Just stick to a good premium unless you have some serious mods....