Air Conditioning and Coolant
Fuel Economy and Mileage
Heating Ventilating and Air Conditioning

Does use of the air conditioner decrease mileage?


Top Answer
User Avatar
Wiki User
2015-07-15 18:19:54
2015-07-15 18:19:54

Yes, fuel consumption will increase with use of your AC system. Your serp belt is only turning a free-wheeling pulley on the front of your AC compressor. When you request AC, an electric clutch behind the AC pulley engages, then your serp belt is turning a demanding compressor. This excess load will actually drop engine RPM briefly at an idle or while cruising. Your vehicle control system will respond by raising the idle to compensate. It is this compensated idle and engine load that brings you back to the gas pumps on the hottest days.

While use of the AC does increase energy consumption, running the AC at freeway speeds is more efficient than opening the windows for cool air. The increased drag caused by open windows uses more fuel than the AC. Around town, however, the AC is less efficient than rolling down the windows.

To reply to the answer about fuel mileage being better at highway speeds vs. rolling down the windows, this is only true in some cases. If you have a small enough engine, running the A/C at highway speeds can have a worse affect on mileage than opening the windows.

User Avatar

Related Questions

No you don't have to remove the air conditioner dryer to use the pulley.........

You will use more gas when your air conditioner is running.

You can buy an traditional air conditioner, and fix solar panels on the roof,then use solar panels supply the air conditioner.

Up for debate--Will lower fuel mileage, but if you take into consideration the increased wind resistance created by having windows open--probably a wash Up for debate--Will lower fuel mileage, but if you take into consideration the increased wind resistance created by having windows open--probably a washYou will use more gas when your air conditioner is running.

The first air conditioner for the home was available in 1928 when Willis Haviland Carrier developed the 'Weathermaker', an air conditioner for private home use.

Don't use air conditioner or heater, roll windows down, and don't put stuff on top of the car (like a car top carrier).

form_title= Air Conditioner Reviews form_header= Stay cool with a great air conditioner! Do you want a window unit?*= () Yes () No How often do you use your air conditioner?*= {Daily, Weekly, Monthly, Other) Are you replacing an existing unit?*= () Yes () No Do you have central air?*= () Yes () No

Air conditioner service cost depends on the problems and materials use in changes.

there is no air conditiner until you use your tool box

you use freon to cool your car and make the air conditioner work

Yep. You get it in there. you can use a central unit if you can get it in there.

If you use a fan or some form of air circulation it will decrease the feel of the temperature though it may not decrease the actual temperature.

Air conditioners manufactured between 1970 and 2010 use Freon as a coolant. Freon is scheduled to be phased out of usage by 2020. Newer air conditioner models use a different type of coolant.

What wire do you need to use to hook up air conditioner ? Does it need to be 10/2 with ground? How do I connect this. Thanks!!

I suggest that you put your air conditioner on low or use the fan on the air conditioner because it uses less energy. Another thing you could do is take a regular fan and put in the window to get air flow.

When a car runs, it produces heat as a wasted product. This heat is then used to heat up air and blow it at you. This heat will be created even when the heater is off, so using the heater should not lower gas mileage.

Use the air conditioner whose product of votage X amps is the lowest if you want to pay the least to operate.

No, the air conditioner would not last long at it would be running too slow.

Yes. It costs less money to run a smaller sized a/c system.

It depends on the size of the air conditioner. But an air conditioner along with all electrical equipment will use an amount of watts or kilowatts continuously. The energy used is measured in watt-hours or kilowatt-hours, in other words multiply the watts by the hours it is switched on.

In general, no. Cars used to use CFCs as the refrigerant fluid in the air conditioner. Some of it would be released if the air conditioner had a leak. In the US, cars manufactured after 1993 have air conditioners which do not use CFCs.

A 12000 BTU air conditioner draws close to 15 amps. While it technically can run on a 15 amp breaker, you may want to use a smaller air conditioner to be on the safe side.

Is it feasible and approximately how much will it cost to replace the air conditioner in my '91 Miata with a unit that does not use freon?

You will not be able to fix air conditioner leaks by yourself. You will need to find and call a qualified technician. Use your local yellowpages book or

Copyright ยฉ 2020 Multiply Media, LLC. All Rights Reserved. The material on this site can not be reproduced, distributed, transmitted, cached or otherwise used, except with prior written permission of Multiply.