My old '71 Hemi Charger R/T w/3:55 gears used to get around 12 MPG in the city, & about 15 on the highway. Car was all stock except for the heads being redone back in the later 70's - a place in Detroit called "Corky's" did them. I was the second owner of the car & bought it in 1980. Lost it in a fire in Aug, 1984. RIP old friend. And yes, oddly enough I did regularly check the fuel mileage just out of curiosity.