I'm sure this is going to make someone very amused, so please pardon my ignorance. Still learning. I got my boost stick from KD and put it in and my mileage seems to have dropped a bit. I'm still on the stock tune until Diablosport finally sends my tuner back. I'm making 30+/- lbs of boost now but if it makes my mileage go down I may take it back off. My impression was more boost=more efficient combustion=better MPG. Is this incorrect? I sure do love the sound of the turbo with it on though... 