Welcome, I just joined myself. I have a 7.3L (CC, SB, Auto and 4X4) '01 and get about 13.5 around town and just got back from a beach trip and got 18.6 mpg. I have gotten 19.2 mpg last year on a trip to the NC outer banks. I have a tuner set on HP, K&N and run the cetane booster (white bottle...