it seems like everyone is always complaining about mpg.....CLEAN UR FOCKIN THROTTLE BODIES....it would help..... my truck stays around 17-19 mpg.....also if ur runnin a resonator replacement on ur engine like this picture here..... then you need to open up the exhaust as well get rid of the focking exhaust resonator....i get almost 20 mpg at 65mph......granted i have a rcsb but it shouldnt be to big of a diff i am also 4x4 so i weight more as well.....on another note my truck usually gets in between 5-10 mpg cause i like my gas pedel...so u also have to drive smart.....just my .2 good luck people

 

well i'm not being **** here but im only getting 13 city and 17 highway and my truck is only 5 months old so i dont think a dirty throttle body is the casue of my bad gas milage, i also have cold air intake and flowmaster exhaust, and my milage is the same weather i'm heavy on the gas or light footed, I'd really love to know how people get that good of milage, i didn't even see that in my rcsb with the 4.7 just my .02 though