Is mileage affect by the use of air conditioning

Asked by Jul 07, 2007 at 03:13 AM about the 2006 Acura MDX AWD Touring

Question type: General

If I use my air conditioning will I get less gas mileage?

5 Answers

4,945

Yes, you will lose fuel economy when running your air conditioner. However, different driving situations call for different use. Driving down the highway at 70 MPH with the windows down for ventilation, and the air conditioning off will actually cause you to get worse fuel mileage than with the A/C on and the windows up do to the worse aerodynamics causing more drag on your vehicle.

3 out of 3 people think this is helpful.
155

when driving with the air con on u usually loose about 2-5 mpg if ur a christian driver and really sit at a stop sign letting every one go and then dont floor it to 60 u probably wont loose any

1 out of 1 people think this is helpful.
20

depends on the situation. city driving with ac on will cause loss in millage. highway drivin tho will not due to the engine already not havtn to work so hard to keep the truck movin. windows down on the highway not good idea cuz loss of areodinamics.

1 out of 1 people think this is helpful.
385

If you do all the math (which i haven't) you can figure the loss of horsepower, and turn this to a percentage of total horsepower, then figure how much harder the engine works because of the power loss, then figure your current gas milage and factor the extra effort and somewhere eventually you'll find out that the loss is only a percentage of a single MPG

25

actually.. it depends on your car.. it takes less than one horse power to turn the compressor on most cars.. If you have a diesel and drive , not idle... no loss of mph And any big block will show little loss.... but at idle.. these engines may up the rpms... thus causing extra fuel ussage.. if you drive a little crappy vehicle, (which i hope so... cause when we eventually crash into each other.. i will live...) then your little motor will feel the effects of ac, espesially if underpowered but at worst a mph or two but if you drive slower than 20 mph all the time it will cause

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