OFFICIAL RESEARCH BY MYTHBUSTERS:
Mythbuster proved last night (last night in WA - on TV) that it is more economical to drive whith your windows down than with ur windows up and aircon on flat out
two suv's with the same payload with 5 gallons of petrol where sent around a track to find out which would stop first.
suprisingly, the car with the aircon on was the one to stop the first
the other suv went for a further 15 miles
the reason that this is suprising is that one would have thought that the drag created by all the air being sucked into the car with the windows open would have made it slow down first, BUT, mythbusters have shown that it is more economical to drive with the windows down
So there u go fellas - windows down then in the future seems the way 2 go!!!
:cooldance