Opinions please! 1996 Dodge Ram

FWIW, mine is 1996 Club cab short bed. 5.2 Manual, with 3.55 gears.
I have added shorty headers, Magaflow catalytic converter, and Magnaflow exhaust. K&N filter in stock housing, and electric fans. I have heavy 20" chrome wheels too. Soft vinyl tonneau cover.

I routinely get 18-19 in city, and a little better on highway. If I keep under 65 MPH get low 20's on MPG, and that is with standard driving techniques, I wonder what it would do if was agressively driving for max MPG...25? maybe.