Windows down or A/C on -- which is more fuel-efficient?

  Prev Next  


How the Toyota Hybrid X Works

How the Toyota Hybrid X Works

The Hybrid X concept car from Toyota sparked interest in another Prius-like model. Learn how the Hybrid X evolved and what Toyota's plans are for it.

Related HowStuffWorks Articles


  • Arthur, Dani M. "Will rolling down windows save fuel or not?" July 22, 2008. (June 5, 2009)
  • Austin, Michael. "Gas Pains: Mileage Myths and Misconceptions." December 2008. (June 5, 2009)
  • Hill, William, et al. "Affect of Windows Down on Vehicle Fuel Economy as compared to AC load." July 13, 2004. (June 5, 2009)
  • Motavalli, Jim. "The Air Out There: An Endless Windows-vs.-Air-Conditioning Debate." The New York Times. July 30, 2008. (June 5, 2009)
  • U.S. Department of Energy. "Tips for Improving Your Fuel Economy." (June 5, 2009)