On Aug 28, 2007, at 3:27 PM, Malcolm Stebbins wrote:

> --- Maggie Dew <wildebus@GMAIL.COM> wrote:
>> What say you?
>
> Google: Does AC Affect MPG?
>
> they all say the same:
>
> http://www.whatcar.com/news-special-report.aspx?NA=217592&EL=3144038

But what about the variable that I believe maggie asked about? Do
open windows in a vanagon to naturally ventilate  cause just as much
of a decrease in mileage as AC?  W/ windows up & no AC on, I don't
doubt the 2-3 mpg gain, but w/ windows down do you loose 2-3 mpg to
increased drag?

It wouldn't surprise moi, as I have driven across Kansas/Missouri in
the summer w/ the windows down(no AC) to beat the heat, & the drag
was amazing, not to mention very noisy.

YMMV,

Tom B.-hard to hear the stereo w/ the windows down at 70 mph.
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