Go Back   EcoModder Forum > EcoModding > General Efficiency Discussion
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 07-30-2008, 04:50 PM   #1 (permalink)
EcoModding Lurker
 
Join Date: Jul 2008
Location: illinois
Posts: 72

EP3 - '03 Honda Civic Si
90 day: 31.73 mpg (US)

Scooter - '93 Honda Elite 80
90 day: 74.87 mpg (US)

Ape - '07 Aprilia Sportcity 250ie
90 day: 66.97 mpg (US)
Thanks: 0
Thanked 2 Times in 2 Posts
Better fuel economy with windows cracked, or A/C?

I have heard that windows up a/c on on the highway over 45mph is more efficient than windows down, but the only tests i've seen(mythbusters) is with the windows all of the way down. Typically i will ride with the windows down 1-2 inches on the highway(my car only has two windows, 2003 civic si hatch) so is 1-2 inches down better than up with the a/c on? Is 1-2 inches down better than widows up and blower blasting with no a/c? Or is a/c set to recirculate with blower set relatively low better? I appreciate any help.

__________________
  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 07-30-2008, 08:35 PM   #2 (permalink)
Master EcoModder
 
NeilBlanchard's Avatar
 
Join Date: May 2008
Location: Maynard, MA Eaarth
Posts: 7,907

Mica Blue - '05 Scion xA RS 2.0
Team Toyota
90 day: 42.48 mpg (US)

Forest - '15 Nissan Leaf S
Team Nissan
90 day: 156.46 mpg (US)

Number 7 - '15 VW e-Golf SEL
TEAM VW AUDI Group
90 day: 155.81 mpg (US)
Thanks: 3,475
Thanked 2,950 Times in 1,844 Posts
Hi y'all,

All I know is that if I run my A/C, the fuel economy plummets. And with the windows open all the way, the noise level is pretty high; and noise is a good indicator of drag. Cracked windows, with a little vent fan if needed, is best.
__________________
Sincerely, Neil

http://neilblanchard.blogspot.com/
  Reply With Quote
Old 07-30-2008, 11:18 PM   #3 (permalink)
Banned
 
Join Date: Jul 2008
Location: Hamilton, USA
Posts: 8
Thanks: 0
Thanked 0 Times in 0 Posts
he's right, cracked windows, with a little vent fan if needed, is best. Take note that one of the best ways to optimize mileage is to keep up with vehicle maintenance. And don’t waste gas by accelerating up to red lights and stop signs.Don’t let your car idle excessively. Drive as if you have no brakes.

________________________
Autopartswarehouse Car Solutions.

Last edited by petty; 07-31-2008 at 12:53 AM..
  Reply With Quote
Old 07-30-2008, 11:26 PM   #4 (permalink)
Weight Reduction
 
ankit's Avatar
 
Join Date: Feb 2008
Location: VA
Posts: 313

4x4 - '06 Nissan Altima 2.5 Special Edition
90 day: 29.04 mpg (US)

Mom's Van - '99 Plymouth Voyager SE
90 day: 25.62 mpg (US)
Thanks: 0
Thanked 0 Times in 0 Posts
Send a message via AIM to ankit
A friend of mine was sitting in my car today and told me that he heard that it is more fuel efficient to use diagonal windows. So the driver's side front and passenger side rear because it somehow causes less drag. I've never heard of that working but wondering if anyone has any experience with it.


I also just crack windows at highway speeds just because I can really feel the drain on the engine the a/c causes even at a low blower speeds.

Edit: another thing that has helped me a lot is a window shade. It was like a couple of bucks at big lots bit it really keeps the car cool. Sometimes it feels like when i return to it after a couple of hours of it being parked in the sun, it seems like it is cooler in the car (normally like an oven). Because of this you don't have to run the A/C immediately or the blower or sweat (your choice) as much because the car wasn't all that hot to begin with.

This is what i'm talking about because i don't know what it is calle.d

__________________





Quote:
Live Simply So Others Can Simply Live
-Ed Begley Jr.

Last edited by ankit; 07-30-2008 at 11:41 PM..
  Reply With Quote
Reply  Post New Thread


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Fuel Economy related papers tasdrouille General Efficiency Discussion 41 03-19-2021 06:31 PM
smart cdi (diesel) owner from BC, Canada smartzuuk Introductions 29 09-06-2018 03:09 PM
2008 World Fuel Economy Championships - Scores Dan. General Efficiency Discussion 24 06-23-2008 09:50 AM
Video: Fuel Economy Decrease with Opened Windows Peakster Aerodynamics 21 04-30-2008 12:13 AM
Basic EcoDriving Techniques and Instrumentation SVOboy Instrumentation 2 11-17-2007 11:38 AM



Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com