The dodge rams were not known for their mpg. My opinion, do not waste your money on a gas pickup programmer. If it was a diesel, heck yea, real results. Gas not much difference. I now drive a 07 classic GMC with the 4.8, 14.5 mpg. Programmer and exhaust work done and now maybe 15.3, going down hill with a tail wind,but not all the time. Your pickup is about where they should be.
Bill