The bottom line it this. Gasoline is gasoline. The base stock comes from only a few refineries in the US. In other words the only difference in gasoline brands lets say from Shell to Chevron is a small additive package. That's it. These additives don't give gasoline more power. Most are cleaning additives like Techron or octane additives like alkie or toluene.
An off brand gasoline with 92 octane has 92 octane. Shell 92 octane gas has 92 octane. What makes a top tier gasoline is not more power or octane but the cleaning additive package it has.
I really wish there was a cheap additive that I could put in gasoline that would give me 10 to 20 HP. I would buy it by the case load.
The reason amature racers like E85 so much is because it's dirt cheap and we can make big power with it and our hobby is subsidizes by the American taxpayer. :B
