[quote]ORIGINAL: npeifer

6 Gas-Saving Myths
by Peter Valdes-Dapena
Thursday, May 15, 2008
provided by

#5. To A/C or Not A/C

There's no question air-conditioning makes extra work for the engine, increasing fuel use. But car air conditioners are much more efficient today than they used to be. In around-town driving, using the A/C will drop fuel economy by about a mile a gallon.

I agree with your statement when speeds are under 60 mph. However, it has been proven that A/C will give you better fuel economy when speeds are over 60 mph because your car will have less drag (i.e., less air turbulence) with the windows closed.