The EPA estimated gas mileage for a 1991 Chevrolet Camaro with the 3.1L V6 engine varied slightly depending on the transmission (automatic or manual) and whether it was a coupe or convertible. However, you can generally expect figures in the range of:
* City: 17-19 mpg
* Highway: 24-26 mpg
Keep in mind that these are *estimates*. Actual gas mileage will depend on driving style, vehicle condition, and other factors. A poorly maintained car will likely get significantly worse fuel economy.