How much miles per gallon does a mustang gt fastback get?

The fuel economy of a Ford Mustang GT Fastback varies by model year and driving conditions, but generally, it averages around 15-20 miles per gallon (mpg) in the city and 24-28 mpg on the highway. For the latest models, EPA ratings typically place the combined mileage at approximately 18-24 mpg. Always check the specific model year for the most accurate figures.