Yea I reset my dash mileage meter when I reset the trip meter and fill it up.
Zoodad, AD2, SCT Livewire, Looney Wild and Panty Dropper Tune, Cass 155cc injectors, ARP studs, 4 inch turbo back straight pipe, Sinister EGR delete, Blue Spring upgrade, Upgraded STC fitting, Turbo drain tube upgrade, CAT ELC coolant, level kit, 5% limo tint, 35 Toyos and 20s, Recon smoked cab and mirror lights, Recon smoked tail lights, Harley headlights, 5k HID head and fog lights, Recon fire/ice LED stick under tailgate, Camlocker toolbox, N-fab bars
LOL, but yeah dude look how far from stock you are! I hand calced mine and it was .5 mpg off. So for a stock truck it is more then close enough but when you add all those goodies it may get confused
But after I run my numbers I will re-calc with the tune loaded to make sure I am close to apples to oranges
I bet with all your mods that truck is rightous!