Thinking about buying a chip for the advertized increase HP and Fuel improvement , I have a 2004 2/WD 4.6 automatic f150'supercab, ngetting roughly 15 mpg now and it runs great, no issues, I change oil every 3K for warranty stipulation, , so im a year out of owning her outright and was hoping to get some avice from someone who may have already did this first, before any other mod and possibly let me know how it work for you,
Thanks for any advice,