I'm pretty sure most of these guys are on crack or failed 3rd grade math. I'm stuck in the 16MPG range just driving the speed limit. That's with a CC SB FX4 with 3.73s and stock 20's (dpf delete, intake, and IDP tunes). The only way I can see getting over 20MPG is with a 4x2 manual with 3.31 gears and a delete.