Gas-Saving Moment of the Day: A/C vs. Open Windows

Window

As summer approaches, how do you best keep cool in your car? Is it better to crank the air conditioner or lower the windows to save energy? This question isn’t as simple as some people make it out to be.

Yes, using the air conditioner lowers your vehicle's fuel economy because it uses power from the engine (unlike the heater, which simply borrows engine heat). However, at high speeds, lowering the windows creates drag that requires the engine to work harder, also lowering your mpg.

The key is aerodynamics. If you have a sleek, wind-slashing vehicle like a Chevy Corvette, it will get better highway mileage with the windows up and the A/C cranked. On the other hand, if you're doing 65 mph in a Chevy Tahoe, aerodynamics aren't going to make a bit of difference anyway.

Essentially, though, the lower the speed, the more sense it makes to forgo A/C. Once you hit the highway, though, the less drag the better.

Related:
Tips for Saving Fuel (Cars.com)
Gas Saving Moment of the Day (KickingTires)

Comments 

Gary R

The fellas on Mythbusters did a segment on this very issue. Unfortunately, they used Ford Expeditions which have all the aerodynamics of a storage shed. It doesn't matter if the windows are down or not, they push a lot of air instead of slide through it. They should have also done this test with an aerodynamic passenger car to see what the results would be.

J

How about just wear lighter clothes?

I like this article, what people need today is some really good tips on how to save gas. And because gas prices are said to go higher. People
are searching for gas saving tips. I KNOW A GREAT WAY TO SAVE ON GAS CHECK THIS OUT!


http://www.path.to/WATER-AS-CAR-FUEL/

Isn't high time to think of something better then run our cars on fossil fuel. There are new cleaner burning fuel technologies out there!

I am for saving gas. And in as many ways as you can think of. People now dread the thought of gas going up again. Why not try out some new gas saving technology. click budgetgeek.

I enjoy the forum's comments, there are many ways to save gas. Claims that human release of greenhouse gases is damaging our climate. I think these claims have merit. Well how can we help reduce green house gases. One way is to release cleaner emissions into the atmosphere. Just think if you only needed gasoline and water to run your present auto. Will save on gas & cleaner emissions with new water hydro
power technology. ITS EASIER THAN YOU THINK.

hi,there

i hope this site may be help many people.....Has anyone tried another water for gas kit?

i think many people don't have to try something to understand that it works.
I've seen facts on the news and all over the Internet, that running a car on water IS possible. Even that I haven't
tried doing it, it doesn't mean that it's impossible.

this is not spam but i want many people to see other choice.Has anyone tried the kit? like water4gas,runyourcaronwater etc.
Is it really a scam? if you don't satisfy you can asked for refund..no more pain

You can truly get better mileage....http://carwaterguide.blogspot.com

thank you very much for visit my site

Car induction kits – At Rudie Mods we provide ford Lexus lights, Peugeot Lexus lights, Vauxhall Lexus lights and car lowering springs.

Hello

Now that Cash for Clunkers has used up its funding I thought you might be interested in some information on car donation. Your readers can still donate a car right now and get a tax write off and help a charity. We also offer you a commission of $100 per car donation referral when you add a link to www.donatecarusa.com . All you do is add a link and we cut you a check. Call me or email for more information. It would be great to offer your readers the car donation option and for you to receive the usual $100 advertising share (instead of Google or the newspapers).

Robert

J: The weight differential between light clothes and heavy clothes will do nothing for your fuel economy... ;)

Post a Comment 

Please remember a few rules before posting comments:

  • If you don't want people to see your email address, simply type in the URL of your favorite website or leave the field empty.
  • Do not mention specific car dealers by name. Feel free to mention your city, state and brand.
  • Try to be civil to your fellow blog readers. This blog is not a fan or enthusiast forum, it is meant to help people during the car-buying process and during the time between purchases, so shoppers can keep a pulse on the market.
  • Stay on topic. We want to hear your opinions and thoughts, but please only comment about the specified topic in the blog post.
view posting rules

If you have a TypeKey or TypePad account, please Sign In

Search Results

KickingTires Search Results for

Search Kicking Tires

KickingTires iPhone App
Ask.cars.com