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Originally Posted by barbd00
got a question... if you aren't supposed to use the air conditioner OR roll the windows down what do you do in the summer when it is 100 outside? You have to do something so which is more cost effective? windows or ac
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I think the key is when you have a choice between AC and vents, vents will save you money or Open windows and vents, vents will save you money. 100 degrees out and the AC would definitely be on in my car
As for your questions, I would guess the following (I haven't seen a study on this, but I will see if I can find one later) - it depends where you are driving. If you are in your neighborhood and not driving fast, windows open is better. If you're on the highway and not going up hills or mountains, then AC is better.