Around town with 165 to 170 BHP type 1 engine 20 to 22 mpg; cruising at 70 mph 29 to 31 mpg. Mileage will depend on state of tune, carb jetting, tire pressure, gear ratios, and suspension alignment (toe-in, etc.), and how you drive. These cars are lightweights, so if your milage is bad something (or things) is (are) wrong.