Fuel efficiency (or fuel economy) is a form of thermal efficiency, meaning the ratio of effort to result of a process that converts chemical potential energy contained in a carrier (fuel) into …

Much of this research focuses on technologies that can improve the efficiency of a variety of vehicles, including internal combustion, alternative fuel, and plug-in electric vehicles.

Dec 12, 2025 · Quick Picks Top 10 - Most Efficient Vehicles Compare Old vs. New EPA MPG Find a SmartWay Vehicle Extreme MPG

Nov 7, 2025 · Fuel Economy ... Explore the details of vehicle fuel economy, from current emissions regulations and automotive trends to the information on your new car’s window sticker.

Fuel efficiency measures how much fuel it takes to travel a set distance. Fuel economy, on the other hand, measures the distance a car can travel on a single gallon of fuel (typically …

Sep 30, 2025 · Fuel efficiency refers to how effectively a vehicle converts fuel into movement. In the United States, it’s usually expressed as miles per gallon (MPG), which estimates how …

Dec 12, 2025 · Consumer Reports guide to fuel economy will help you find the most fuel efficient car and save money at the pump.

Fuel efficiency measures the distance a motor vehicle can travel on a single gallon of gas.

Dec 23, 2025 · A publication of recent and historical U.S. energy statistics. This publication includes total energy production, consumption, stocks, and trade; energy prices; overviews of …

Mar 24, 2025 · Engine fuel efficiency is determined by measuring how much of the energy in the fuel gets converted into power for the vehicle. Most gasoline engines are 30 to 35% efficient.