Join Date: Dec 2008
Location: Salem, NH
Thanked 59 Times in 46 Posts
i wouldnt worry about your mileage, take a look at my sig i have 100000 on you and i beat the snot out of mine. as far as fuel mileage goes myself i dont see much difference stock or tuned, could be my driving style tho, i like to use that extra power all the time. i still average 15 with my truck, i guess it could improve if i drove normal but honestly i think most of the claims of big mileage gains with a chip is BS, chips add more fuel then stock.
2006 F350 XLT 4x4
ARP Studs, Blocked EGR Cooler, MBRP 304SS Cool Duals, 03 Turbo, Coolant Filter Kit, PCM Flashed Back & Innovative Extreme Tunes - 13.3 @ 99