Anyone know exactly what their "93 octane" tune consists of? To my understanding, running premium fuel only makes a difference when you're running higher compression, and there is no way to electronically change your compression ratio (which is what a PCM tune would do). So, when they say they have an unleaded gas tune, and premium gas tune, are they really just blowing smoke? I can't see running premium in these things making any difference unless the engine was physically assembled different.