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May 18, 2007



All are good, but the last one I was surprised to find, is false. On money.cnn.com I found the following (published May 9):

"There's the old saw that leaving your windows rolled down creates an aerodynamic drag on your car, cutting down on fuel efficiency. And there's the notion that the fastest way to drain your gas tank is by running your air conditioning.

Don't believe either one.

In two separate studies conducted in 2005, the automotive Web site Edmunds.com and Consumer Reports compared the fuel economy of both a sedan and an SUV at highway speeds with and without air conditioning and how open windows affected gas usage.

What they found was no significant difference in fuel economy in either sedan or SUV under either condition. "

I always thought it was true, even though I just ran my AC regardless. Now, the article doesn't suggest what results that Consumer Reports found for 'less than highway speeds' Hmmm...

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