Air conditioning vs. open windows
False. In this scenario, this line of logic would be false. There would be no savings from turning off the air conditioning because opening the windows would create drag, reducing the car's normal gas mileage. Consumer Reports tested the theory while driving a Toyota Camry at 65 miles per hour, and found that choosing air or windows didn't make a justifiable difference.
That's not to say that air conditioning is always the best option. The Department of Energy's website suggests that turning off the air conditioner may improve fuel economy when driving at speeds under 40 mph.