With gas prices rising worldwide, and more people concerned about the environmental impact of fuel consumption, everyone wants to know about the fuel economy of their vehicle. In this section, we show you the basics of fuel economy and contrast and compare between vehicles in this regard. The distance measured by a vehicle and the amount of gasoline consumed are measured by its economy. Consumption can be measured in terms of the amount of gasoline required to go a given distance, or in terms of the distance traveled per unit volume of fuel spent. Many nations implement fuel economy regulations because vehicle fuel use is a substantial contributor to air pollution, and motor fuel imports can account for a significant portion of a country’s international commerce. To approximate the vehicle’s real performance, many approaches are applied. Fuel energy is used to offset losses like as wind resistance, tire drag, and other losses experienced when driving the vehicle, as well as to power vehicle systems such as ignition and air conditioning. To decrease losses at each of the conversions between the chemical energy in the fuel and the kinetic energy of the vehicle, a variety of techniques can be used. Driver conduct can have an impact on fuel economy; moves like rapid acceleration and hard braking waste energy. Because electric automobiles do not burn fuel directly, they do not have fuel economy per se. However, equivalency measurements such as miles per gallon gasoline equivalent have been developed to compare them.