I have a 2006 Mitsubishi Lancer Evolution. The car is completely stocked and has about 35 thousand miles on it. I came across the B-12 Chemtool, and was talked into buying it. I tried it with absolutely zero expectations. Well, to put mildly, Wow! What a difference. My car had been suffering a low RPM detonation problem– I am talking normal driving right off the line. Within 25 miles of having a full 15 ounces in 14.5 gallons of fuel, the detonation was completely gone. My car had been detuning itself because of this problem for at least a year, and now all of the sudden I feel as if I have 50 more horsepower. I have gotten five other people to try it and everyone agrees that Chemtool is awesome.