Wouldn't it depend on the formula?
Explain what you mean. I know there is a difference in concentrtions and brands as I have tried several types (including one that claims to add 25 Hp LOL) Funny thing is I did notice a difference after using that one, but I dare not say it was a 25 hp increase. I have experienced a difference between NOS brand raod formula (claims to add 3 points) and their Race formula(claims to add 7 points)