Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - Better fuel economy with windows cracked, or A/C?

dann_04 · 07-30-2008, 04:50 PM

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.

07-30-2008, 04:50 PM	#1 (permalink)
dann_04 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. __________________