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no, actually, it takes fuel to use the a/c. Another thought ... with the windows closed, there is less air drag, which then makes the car more aerodynamic.

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17y ago

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Air Conditioning is a unit connected to the engine... when ac on, it connects to power from the engine to make it operate... it uses power making the engine work harder, consuming more gas. I've heard from research that driving less that 50mph(or 40 i think) with windows down is more fuel efficient.. while driving 40 or 50mph + and having the ac on is more fuel efficient.. because of drag from wind.


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