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Author Topic: To use Air condition in your car or not? Back to Topics
totallyforgiven
Rookie Author
Pennsylvania

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Message Posted: May 6, 2008 2:35:00 PM

Here are a couple of tips from this site:
4 Use A/C Sparingly When the air conditioner is on it puts extra load on the engine forcing more fuel to be used (by about 20%). The defrost position on most vehicles also uses the air conditioner.
5 Keep Windows Closed Windows open, especially at highway speeds, increase drag and result in decreased fuel economy of up to 10%.

I am confused, if I am travelling, especially in the summer, lol, I either need the air conditioner on or I need the windows open, I can not stand to ride in a car that is shut up and stuffy, lol.
REPLIES (newest first) Post a Reply
lilwoof63
Veteran Author Grand Rapids

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Message Posted: Feb 6, 2014 3:10:49 PM

When the outside air is between 70 and 75 windows open...when it gets 76 and higher...A/C baby!
vonEinik
Rookie Author Florida

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Message Posted: Jan 20, 2014 10:48:53 AM

Previous car had didn't work air conditioner. It was terrible in hot weather. With babies it's terrible two times more. We can to use open windows for both of us with my husband, but when two babies feels bad - impossible to haven't air conditioner. So now our conditioner works, just when it's not so hot - we open windows

[Edited by: vonEinik at 1/20/2014 10:49:24 AM EST]
GLM4205
Champion Author Toledo

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Message Posted: Jan 16, 2014 6:07:37 AM

Only when it's humid and hot...
Boyrr
Champion Author Allentown

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Message Posted: Jan 13, 2014 6:19:15 AM

it its hot, turn it on.
Hemond
Champion Author Providence

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Message Posted: Jan 13, 2014 2:08:03 AM

:::::Disable it during the Winter and if it's not able to kick on in defrost the compressor can lock up during the Winter so I've been told.:::


I don't see how that is possible. Who ever told you that?
happylilly
Champion Author St. Louis

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Message Posted: Jan 13, 2014 1:07:54 AM

yes when it really hot
Grateful11
Champion Author North Carolina

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Message Posted: Jan 12, 2014 9:02:02 PM

Run when it's needed.

Disable it during the Winter and if it's not able to kick on in defrost the compressor can lock up during the Winter so I've been told.
magpie2013
Champion Author Milwaukee

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Message Posted: Jan 12, 2014 6:22:16 PM

In the summer if its really warm.
Hemond
Champion Author Providence

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Message Posted: Jan 12, 2014 10:51:13 AM

I wish I could disable it for the winter. A nuisance. Even though there is an "off" switch, I usually forget its running automatically.

There is little reason to run the AC in January.
PatAZ
Champion Author Tucson

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Message Posted: Jan 12, 2014 10:26:07 AM

Never a question when it comes to our comfort, use it.
Fredelin
Champion Author Toronto

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Message Posted: Jan 12, 2014 9:47:33 AM

not so often, even in the summer!
RalphHightower
Champion Author South Carolina

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Message Posted: Jan 10, 2014 6:11:16 AM

use it
PAA64
Champion Author Cincinnati

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Message Posted: Jan 10, 2014 12:41:44 AM

use it
Desoto49
Champion Author KW

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Message Posted: Jan 7, 2014 10:30:08 AM

Using it year-round
borsht
Champion Author Oakland

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Message Posted: Jan 6, 2014 6:39:17 PM

Mythbusters actually did a bit on this..yes, the a/c does cost you a little bit of gas mileage, but so does the wind resistance of riding with the windows down. It worked out to be essentially the same, under their test conditions. So you can take your pick in the summer, a/c or riding with the windows down, it up to you.
That being said, the statement about affecting gas mileage by 20% IS NON-SENSE.
A very small engine will have a much higher percentage change in efficiency due to the air conditioner load than a large engine.

There are so many factors, that it is impossible to make a general statement on efficiency. If you're driving in central Georgia in the summer,with 90% RH and 90Degrees, the airconditioner will take more Horsepower from your engine than it would driving in the desert, with 20% RH and 80 degrees.
A dark colored car will have a higher solar uptake than a white car.

I suggest just doing what works best for you. forget a general simple rule.
If you have an indicator informing you of your current MPG, then that is how much you are being affected. Just do a simple test for you self.


[Edited by: borsht at 1/6/2014 6:40:11 PM EST]
TriniB
Champion Author Montreal

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Message Posted: Jan 6, 2014 2:19:34 PM

Yes
SmoknFord
Champion Author British Columbia

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Message Posted: Jan 6, 2014 11:39:00 AM

If it's hot out I will turn the AC on. Don't need another reason for my wife to complain about.
BartandLisa
Champion Author Newfoundland

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Message Posted: Jan 6, 2014 7:59:37 AM

Use it
northroad
All-Star Author Austin

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Message Posted: Nov 23, 2013 12:30:19 PM

Obviously you're going to run AC in the summer unless mileage is more important to you than comfort. For me I cycle the AC, like 5mins on 5mins off with cabin recirculate
RalphHightower
Champion Author South Carolina

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Message Posted: Nov 23, 2013 7:40:12 AM

AC
Thumper52
Champion Author New Brunswick

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Message Posted: Nov 23, 2013 5:59:41 AM

Summer
stonejd
Champion Author Illinois

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Message Posted: Nov 21, 2013 8:15:54 AM

comfort is a must - AC
riggers711
Champion Author Washington

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Message Posted: Nov 21, 2013 7:24:36 AM

When I'm by myself I like the car hot
happylilly
Champion Author St. Louis

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Message Posted: Nov 21, 2013 2:58:29 AM

use it
jack4141
Champion Author Alabama

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Message Posted: Oct 25, 2013 4:06:06 PM

Only when it hot.
RalphHightower
Champion Author South Carolina

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Message Posted: Oct 25, 2013 6:07:34 AM

use it
dgsteven
Champion Author Los Angeles

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Message Posted: Oct 25, 2013 3:07:08 AM

use it
krazkar
Champion Author Calgary

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Message Posted: Oct 24, 2013 11:37:25 PM

To use it!
TomB2
Champion Author St. Louis

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Message Posted: Oct 24, 2013 1:24:43 PM

Use A-C when it's hot.
GAJDHI
Champion Author Montreal

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Message Posted: Oct 17, 2013 4:41:54 PM

yes
jack4141
Champion Author Alabama

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Message Posted: Oct 17, 2013 2:58:40 PM

Yes only summer time.
Jimkhope
Rookie Author Ontario

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Message Posted: Oct 14, 2013 12:21:11 PM

If you're asking this question for the sole purpose of saving fuel then shut it off at low speeds (under 50mph/80kph). You will get better fuel economy with the windows open than running the A/C compressor. At highway speeds the drag created by having the windows open uses far more fuel than having the A/C maintain a constant temp in the car. Remember that the A/C compressor cycles on and off, it doesn't keep running the whole time so close your windows and enjoy the cold air.
As for me, I run the A/C whenever I feel warm. Screw the fuel savings, I don't wanna sweat if I don't have to. lol
karl13
Champion Author Miami

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Message Posted: Oct 12, 2013 5:01:35 PM

Depends on who is with me and how far I have to travel.
ace12012
Champion Author Phoenix

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Message Posted: Oct 12, 2013 4:06:44 PM

in Arizona we use it often.
Desoto49
Champion Author KW

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Message Posted: Oct 10, 2013 4:24:23 PM

I use it often
namzza6310
Champion Author Milwaukee

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Message Posted: Oct 10, 2013 10:31:43 AM

It is better to run the vehicle without AC on. But if it hot then it is more efficient to run AC then have the windows fully opened.
TomB2
Champion Author St. Louis

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Message Posted: Oct 10, 2013 9:20:40 AM

With just a couple windows partially open, you'll still get better gas mileage than when running the A-C. When it's hot, I run the A-C.
carinthuist
Champion Author San Francisco

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Message Posted: Oct 8, 2013 11:29:29 PM

no
pagbowl
All-Star Author Pennsylvania

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Message Posted: Oct 8, 2013 8:24:56 PM

I use it
dieharder
Sophomore Author Ottawa

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Message Posted: Oct 8, 2013 12:34:56 PM

Modern AC systems are so efficient that you get better MPGs using the AC than when rolling with the windows down.
Boyrr
Champion Author Allentown

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Message Posted: Oct 8, 2013 10:01:34 AM

use it
contiki
Champion Author Ontario

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Message Posted: Oct 8, 2013 6:50:38 AM

We use it when needed...........
RalphHightower
Champion Author South Carolina

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Message Posted: Oct 8, 2013 6:48:54 AM

AC
jl1rp
Champion Author New Hampshire

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Message Posted: Oct 7, 2013 7:27:40 PM

Use it when needed.
Retired-Coastie
Champion Author Arkansas

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Message Posted: Oct 4, 2013 8:29:19 AM

I'm so hot natured that I use mine during the winter time. And my wife's new vehicle has ventilated seats to cool me even more.
citizen1
Champion Author Connecticut

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Message Posted: Oct 3, 2013 11:22:52 AM

I did not buy a care with air conditioning so that I could not use it.
justinemt14
Champion Author Philadelphia

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Message Posted: Oct 3, 2013 11:00:03 AM

I try to avoid using it whenever possible.
jay93LA
Champion Author New Orleans

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Message Posted: Oct 3, 2013 9:45:03 AM

yes
Boyrr
Champion Author Allentown

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Message Posted: Oct 3, 2013 9:13:34 AM

when it hot, turn the AC on, how can that be such a big deal?
no_whereman
Veteran Author California

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Message Posted: Oct 2, 2013 8:48:14 PM

Of course, I want comfort!
Chazzer
Champion Author Nevada

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Message Posted: Oct 2, 2013 1:23:08 PM

YES!
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