Gasoline saving tip - air it up!

[Descant]

I recall "Mythbusters" disproving the idea that turning off the ACX saved gas. Part of the issue was aerodynamics. If you turn off the AC, you open the windows and lose the clean airflow of a car with closed windows. Perhaps in city driving where there is little or no aerodynamic consideration? They also noted that airflow will keep you dry in a top down car during light rain.