Awhile back we had the discussion of removing the stock resonator and intake junk to increase power. I had done this and noticed that my mpg jumped from 32-33 to 37-38. I constantly got 37mpg for 3 months, the highest ever. To test my theory I put all the stock stuff back on and again I got 33mpg at my last fillup. I then took everything back off, except the resonator this time, the noise was getting to me, and I'm back to 37mpg. Now, while thinking about this, the o2 sensor or whatever wants to maintain a certain air:fuel ratio correct? So if the car gets more air, the amount of fuel must be reduced to keep this ratio the same. Does this make any sense or am I just experiencing a coincidential fluke?