For the ultimate cheap mileage beater, honestly can't beat an old geo metro. I've got a 94 and a 96, 3 doors, 1.slow L 3 cylinder, 5 speed, 96 has obdII so hooked an ultragauge up to it and has air bags, just putting to work and back going slow I get 43 with that one, hypermile it on the hwy can...