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What up brothers,
When driving on on interstate I-95 east coast ( or any interstate highway) which is better for getting better gas miles mph?? Driving with a/c and windows closed or driving with windows down which give wind against our civics, which provides wind power against driving , which may lower our mph.......????thanks. Windows open or closed going 70 mph

 
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Damn good question, I would like to know also. But im guessing driving with the windows up, and having the A/C at about two notches would give better mpg. Just a guess.

 
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I always drive with windows up on the highway. It would be so noisy otherwise. But at that speed, an open window would produce alot of drag and lower mpg. You're better off using A/C. Also staying around 65mph will keep you just below the range where vtec engages. So that will help more...and use the cruise control.

 
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yea windows up at highwayspeeds will save you gas, even if you have the AC on

 
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Thanks ya'll, that is what I guessed, windows up with a/c on low- medium will save gas

 
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windows up and no ac haha

 
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ahhaaa,
You big clown, not in Charleston , SC
A sauna dude, even with my tint!

 
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windows up and no AC....dude, there's gonna be some air flowing through your vent..

 
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keep it at 65 and u save a wee bit more gas. heh.

 
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you're talking about like 1mpg difference... so you should do what's most comfortable... if it's a beautiful day with a sweet breeze, rolls those windows down... if it's 110 degrees blast that AC!!

just my opinion...

 
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Windows up on the highway with AC on IS more efficient.... but who cares!!!! It's NOT an SUV!!!! Life could really suck! Civics rule at the pump.

 
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this was on honda tech and i just recently check it out again. at higher miles if u have windows up and a/c ful blast, is same as windows down. on lower speeds ~30 windows half way and one notch a/c is best. thats all u need to know

 
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i always have windows down and A/C on when cruising


i dunno that's just me....i don't care about gas mileage (me = HX)
and i don't care about gas money (me = spoiled)

 
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Win up and use ac. I get about 44 mpg @73mph using cruise control.

 
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windows down no a/c would yield better mpg in my opinion.

 
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This question was covered Sunday on Car Talk. Two studies indicated that windows down creates drag that exceeds the savings from not running the AC. Our cars are pretty aerodynamic with the windows up. Driving with the windows down creates a lot of turbulence and drag. I do it anyway on nice days, but for fuel efficiency, keep the windows up.

 
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Hmmmmmmm..........very interesting. I think i should turn on my ac more often lol. I rarely turn it on unless its 110+

 
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jeez dude, how u get 44? honda says 38 on highway and i usually average around 35 mpg