Well, I just got my used Edge over the weekend and after 3 days of driving on stock level 2 tune, I'm averaging between 12.5-13 MPG. I am LIGHT on the foot. I never get into it as I've been trying to see how good the MPGs could be. I have an 06 5.4 FX4 with 3.73 gears. I have no idea what it was getting before the Edge cause I never did the calculations for around town driving. Oh, and using 87 oct fuel. I'm not too impressed with it yet other than all the wonderful readouts....