the all controversial MPG arguement

I rate a car in ''smiles per gallon'' not in miles per gallon.
That being said, i have seen big block cars get up to 20 mpg depending on how they are driven and what gears are in it.
Driving at 55 mph and 2:76 gears with a reasonably tall 15'' tire it would be reasonable for a 383 B-Body for example.