And what blend of O’Donnell are you running as if you are running the Ready To Run blend it will not be any better then Traxxas as it all so is high oil content. The only O’Donnell I will run is the race blend. Go to a Pro race and seen how many are running Traxxas. You never did say if you tried anything else in your Traxxas 4 TEC and what other brands and blends have you run in? All so are you comparing the same nitro percentage?