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11 answers

above 40mph, a/c below 40mph and in stop and go driving, windows open

2006-07-30 04:05:07 · answer #1 · answered by bobsled 5 · 0 0

a/c uses an extra 10% fuel so drive with your windows down a fraction the drag created would be minimal so more economical also drive in the highest possible gear with out labouring the engine too much

2006-07-30 11:14:56 · answer #2 · answered by Pickonme 3 · 0 0

Driving around town is not going to create enough drag to effect your mileage, plus if it's a pleasant day, you can enjoy the fresh air. On the highway at faster speeds you will. The mileage savings, however, aren't that dramatic due to the power it takes for your engine to run air conditioning unit.

2006-07-30 11:18:53 · answer #3 · answered by Thomas S 3 · 0 0

Depends on your speed. The faster you go, the more drag is created. Air-con would be better in that case.

2006-07-30 13:50:13 · answer #4 · answered by Cobeck 2 · 0 0

Window up, A/C on. Less drag.

2006-07-30 11:08:45 · answer #5 · answered by Anonymous · 0 0

windows up, fuel economy is cut by 4% when driving with them open.

2006-07-30 11:13:03 · answer #6 · answered by Chris h 1 · 0 0

air con all the way, then you dont get nasty bugs attacking you either like u do when u have the windows down

2006-07-30 11:06:32 · answer #7 · answered by emmamac14 6 · 0 0

ffs air bloody con does not work with windows open hence no bloody sun roof on models with air con

2006-07-30 11:24:16 · answer #8 · answered by Anonymous · 0 0

Air Con on full time

2006-07-30 11:06:32 · answer #9 · answered by Carlos 3 · 0 0

ha- my car has air con and sunroof.... economy? hmmm, not quite my main concern, that would be convincing girlfriend not to have ac on and sunroof open! what the hell....

2006-07-30 12:42:46 · answer #10 · answered by Vertigogo... 2 · 1 0

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