The Ford Mustang is an automobile manufactured by the Ford Motor Company. It was initially based on the platform of the second generation North American Ford Falcon, a compact car. Introduced early on April 17, 1964, and thus dubbed as a "1964½" model by Mustang fans, the 1965 Mustang was the automaker's most successful launch since the Model A. The Mustang has undergone several transformations to its current fifth generation.
The Mustang created the "pony car" class of American automobiles—sports car-like coupes with long hoods and short rear decks—and gave rise to competitors such as the Chevrolet Camaro, and Pontiac Firebird, AMC Javelin, as well as Chrysler's revamped Plymouth Barracuda and the first generation Dodge Challenger. The Mustang is also credited for inspiring the designs of coupés such as the Toyota Celica and Ford Capri, which were imported to the United States.
The fuel economy of an automobile is the fuel efficiency relationship between the distance traveled and the amount of fuel consumed by the vehicle. Consumption can be expressed in terms of volume of fuel to travel a distance, or the distance travelled per unit volume of fuel consumed. Since fuel consumption of vehicles is a great factor in air pollution, and since importation of motor fuel can be a large part of a nation's foreign trade, many countries impose requirements for fuel economy. Different measurement cycles are used to approximate the actual performance of the vehicle. The energy in fuel is required to overcome various losses (wind resistance, tire drag, and others) in propelling the vehicle, and in providing power to vehicle systems such as ignition or air conditioning. Various measures can be taken to reduce losses at each of the conversions between chemical energy in fuel and kinetic energy of the vehicle. Driver behavior can affect fuel economy; sudden acceleration and heavy braking wastes energy.