You don't seem to understand what i'm saying, tune your car as hard as you can on 98, then do the same on the additive. If this fuel is so much better you will be able to advance the ignition over regular 98. The whole point of a "better fuel" is to be able to run more ignition advance over regular fuel. Note the changes that it allows you to make(boost/timing/afr) and post here again, instead of just putting into a stock car. I could run E85 in a stock car and it would make shit for power if i could even get it to start on a stock tune, but we all know it would make loads more tuned properly for the fuel.