[Christ]

Focii get decent gas mileage, from Ford.
Cavalier or Aveo also good, from Chevy.
For Dodge, you can look at a Neon or even the lesser Magnum, which can get into the 20's easily, and has been known to hit 30's in some people's hands.

All of these cars are quite miserly, compared to the Durango, all can be had used for under $5000 at certain times, except the Magnum.. you'd be hard pressed to find one used for sale unless it's at a dealer, at least around here.