wrote in message
On 13 Aug 2009 12:30:29 GMT
Adrian wrote:


Bruce gurgled happily, sounding much like
they were saying:

Air conditioning is an interesting topic. It does use a small
additional amount of fuel, but in a car, that additional amount is
smaller than would be caused by the increased drag when the windows
are opened.

Got a reference for that?

Bruce seems to be the sort of person dumb enough to fall for that
rather ancient open window rubbish. An open window may well cost more
fuel at 70mph than air con. I suspect the same however is not true
when stationary in a traffic jam or any in town traffic speed.

This article suggests the break-even speed is somewhere around 40mph (I
suspect the break-even speed would be lower in a very aerodynamic car,
and higher in a brick-like SUV).
http://news.carjunky.com/air-conditioning-versus-open-windows-abc477.shtml