[baldlobo]

i know, just about everyone in their dog suggests getting a different vehicle; i'm modding my jeep(currently getting 17mpg city).

you could try changing out the fuel injectors from 1 to 4 hole of the same lb/hr; did that recently to the jeep, smoothed out the idle; the hear say is that it gives 1 mpg or more for the 4l i6(the injectors are out of a 3.3l chrysler mini-van; bright green after 2000)

other than that maybe re-gear/change tires

and make sure your speedo is accurate