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Old 07-30-2005, 10:06 PM   #1
devilzfan300
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AC or Open Windows?

Which lowers your MPG the least?
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Old 07-30-2005, 10:26 PM   #2
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It's been proven that driving with your windows open uses less gas than using the A/C. I don't care, sometimes it's just too hot to drive with the windows open, and need the A/C
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Old 07-30-2005, 11:48 PM   #3
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Quote:
Originally Posted by devilzfan300
Which lowers your MPG the least?
Depends. At speeds above about 35 mph, it is more fuel efficient to use the air conditioner.
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Old 07-31-2005, 12:35 AM   #4
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That, my accord loving friend, makes little sense. Not to bash or anything but the only place I can see that theory coming from is left field. If you are suggesting that the drag created by the windows is so straining on the engine it reduces gas mileage. Then I must say I do have a problem believing that.
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Old 07-31-2005, 12:59 AM   #5
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Quote:
Originally Posted by Zalight
That, my accord loving friend, makes little sense. Not to bash or anything but the only place I can see that theory coming from is left field. If you are suggesting that the drag created by the windows is so straining on the engine it reduces gas mileage. Then I must say I do have a problem believing that.
No, I base everything I say on fact that I see.
http://www.treehugger.com/files/2005..._up_or_d_1.php
http://www.madsci.org/posts/archives...0602.Eg.r.html
http://www.ehow.com/tips_2629.html

Although I will say that I am getting vastly different numbers. I've heard 35 twice, but one site says 65.
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Old 07-31-2005, 01:38 AM   #6
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I see, but the point of the matter is that niether of these two options will significantly reduce your gas mileage. If someone is indeed that worried about thier gas mileage I would suggest riding a bike...
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Old 07-31-2005, 10:06 AM   #7
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A/C lowers gas mileage more, they showed it on Mythbusters, and the open windows car did about 10 miles more when both cars had 5 gallons of gas...
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Old 07-31-2005, 08:17 PM   #8
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thats an extra 2 miles to the gallon...Like I said, If your worried about it, then get a bike, the peddle kind not the super fast cool kind.
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Old 08-01-2005, 06:43 PM   #9
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aint anyone heard of the 2/60 ac? 2 windows down 60 mph. works good lol.
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Old 08-01-2005, 06:53 PM   #10
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Ive been told that excessive use of a/c is bad for human health. Don't know the validity of this statement, some of you may care to do some research. I use a mix of both on the 'lude and all windows on the 7.
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Old 08-01-2005, 07:09 PM   #11
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Quote:
Originally Posted by Zalight
thats an extra 2 miles to the gallon...Like I said, If your worried about it, then get a bike, the peddle kind not the super fast cool kind.

So true. How you drive will have more of an effect than whether your A/C is on or not. Unless you have a tiny engine that the A/C uses up most of your available horsepower... But 99.9% of modern cars simply don't have a problem.
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Old 08-01-2005, 08:38 PM   #12
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aerodynamics

i agree, although the AC compressor does use up some power, its not that big of a problem. also im pretty sure that the aerodynamics of a car might affect whether or not windows or AC is the best for the car. Either way the difference between the two is very small in comparison to the affects of how you drive. Giving 100% throttle and pouncing on the gas at every stoplight is uses up alot more fuel than conservative driving
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Old 08-01-2005, 10:22 PM   #13
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if iam going above 45mph i'll have my windows open other than that the A/C
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Old 08-01-2005, 11:00 PM   #14
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youve got to be kidding me right? lol, id have to say that depending on your vehicle, either way will be about the same, the thing that will change your MPG the most will be the way you drive, hands down, otherwise i would have to say that at slower speeds windows down would maybe save you approx 1 MPG, good thought though, and i agree with the M3 dude on the facts, there are a variety of different numbers
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Old 08-04-2005, 03:50 AM   #15
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just like dude said, did no one see mythbusters, those guys know thier stuff, and proved windows down will get you better milage, it only makes sense, that drag is very little compared to actually driving another component off your drive belt and robbing maybe 5-10 horses right off the bat
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