Well, I don't have a Honda or other high MPG car, but for a v-8 I would say this is pretty good. Especially since it's carbureted, 24 years old, 191,000 miles on it, weighs 3700 lbs, has a frontal area of 20.6 and a Cd of .44.
I plan on lowering it, block off the grille some, put a Hurst Olds air dam on the front and a belly pan. I would like to do something about venting the air under the hood, also. Maybe some air extractors.
Anyway, thought you guys might like to hear about an old hot rodder and drag racer getting good MPG's with a muscle car.