Wow...not a good question to ask right now. Im still on E30 in the logging/tuning stage. This thing makes 25psi almost instantly. Can't keep my foot out of the boost. Adam Brunson does have me set up with three map slots of tunes. I can use my cruise control buttons to switch between them. I put it in the lowest power setting when I was on the 93 octane tune and saw 35mpg on the highway. That was a very unsatisfying two minutes.