I was very successful in gaining a few mpg in my previous vehicle.
The wheels were a impulse buy, had I have known about the affordable lightwheight wheels I have my my current vehicle I would have stuck with a 15x6.5 (11.5lbs each)
Its the only truck type vehicle I've ever had where driving with the tailgate down actually helped its fuel milage..
I once got almost 45mpg (all highway) after removing the spare, spare holder, tailgate, tonneau cover and rear bumper as an experiment.. I think it weighed in at 2190 with a half a tank of gas when I took it to sac raceway and weighed it..
I'd love to get another one of these and add a modern drivetrain to it say, something out of a Celica GTS.. power and mpg when I wanted it..