I used to own a 95. I had the 300 inline 6, 2wd, was a great motor. It was very easy to average ~17-19mpg in mixed driving, and would deliver around 20 on the highway with a really unaerodynamic cap. This was before I found Ecomodder.
My thoughts: a cab kamm-back or spoiler plus partial bed cover could help when empty. Pump the tires up a bit. Add an adjustable grille block (so you can cover maybe 50% when empty). What mine was in want of for MPG was taller gearing and to slow down.