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Effect of A/C on FE

   
Old Aug 17, 2007 | 03:53 AM
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  #21  
rmorrow's Avatar
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Joined: May 2007
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From: Ottawa, Canada
Default Re: Effect of A/C on FE
Originally Posted by rburt07
I had a '81 diesel rabbit that got in the mid 50's gas mileage. I tried the open windows and ended up loosing near 5 mpg. I even tried the Vent windows to full open and that pulled me down 3 mpg.

No more of that. Any open windows with the TCH will be on a parking lot sitting still or while driving slow. Any street driving will be with the vent or AC turned on.
Exactly. Opening the windows or moonroof is fine, when you are going reasonably slow. There's no appreciable drag from doing that. At faster highway speeds, its very significant, and that's where the A/C comes in.
 
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Old Aug 17, 2007 | 03:55 AM
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Default Re: Effect of A/C on FE
Originally Posted by coolshock1
That's kind of discouraging. What's the point of having a moonroof then? I like having all of the windows down and the moonroof open.
So do I. But not at highway speeds. Not only is it bad for FE, but it's noisy.
 
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Old Aug 17, 2007 | 12:50 PM
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Default Re: Effect of A/C on FE
I love driving home from work down the expressway with all of the windows down and sunroof open with the stereo cranked up.
 
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