Does it really save gas to roll down your windows instead of flipping on the AC? "Like most people, I crank up my car's air conditioning on hot summer days. But my wife has recently been tsk-tsking me for this practice—she says the AC wastes too much $4-a-gallon gas, and that we should roll down the windows instead. But I've read that rolled-down windows also decrease fuel economy, since they increase drag. What's the most efficient way to cool ourselves while driving?" http://www.slate.com/id/2194536/ Living in Florida for five years now, I have never rolled the windows down on my Lincoln Town Car. Keep the thermostat at 75 degrees at all times.