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Associate

Join Date: Jul 2007
Location: Birmingham, Alabama
Posts: 36

Should one run with the car windows up or down?

08/13/2007 8:17 PM

How wasteful is it to run the cars A/C ? Some claim an auto gets better fuel economy with the windows up and the A/C on.

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Guru

Join Date: Aug 2006
Posts: 4485
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#1

Re: Should one run with the car windows up or down?

08/13/2007 9:13 PM
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Associate

Join Date: Jul 2007
Location: Birmingham, Alabama
Posts: 36
#2

Re: Should one run with the car windows up or down?

08/13/2007 11:33 PM

Thanks for the heads-up Ken, they certainly covered the topic.

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Power-User
Technical Fields - Education - New Member Technical Fields - Technical Writing - New Member

Join Date: Sep 2006
Posts: 367
Good Answers: 1
#3

Re: Should one run with the car windows up or down?

08/15/2007 7:56 AM

What about temperature shocks for human body?

Take a time to cool down your car before you seat firmly in it! _ My mother-in-law's request!

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Anonymous Poster
#4

Re: Should one run with the car windows up or down?

08/16/2007 10:11 AM

Running with them up is probably no worse than up; and in summer it will probably keep the car cooler. But be sure to take the keys with you or the auto might not be there when you get back. And having strangers use your gas is definitely not as good as windows-up for fuel economy.

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Guru

Join Date: Jul 2006
Location: Eastern Kansas USA
Posts: 1409
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#5

Re: Should one run with the car windows up or down?

08/18/2007 2:57 PM

The mythbusters study was on episode 22, in Nov-2004. I didn't see it, but I recall that their work had a fair amount of room for measurement error. My memory is that Consumers' Union has studied this question and reported that it is almost always more fuel efficient to have A/C off and windows down (but not necessarily most comfortable or quiet).

-JMM

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