Quote:
Originally Posted by Kara
Something to keep in mind (although it might be an evidence here  ) : driving at highway speed with the windows open adds LOTS of drag.
I have no numbers unfortunately ; would be interesting to determine the speed on top of which A/C is more efficient than windows down.
Still, the most efficient is to drive windows up and A/C off, but sometimes it just gets too hot.  |
Cost 4mpg in the 2002 Indiniti Q45 and 5 mpg in the 1999 Jaguar Vaden Plas.