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It would make sense that, with windows down, at highway speeds, the drag on the car would be increased. Windows up would increase the efficiency of the .029 coefiicient of drag, I would think. That, and the variable displacement, pointed out by Beav, could possibly equate to better fuel efficiency, but, no, I have not substantiated evidence.
My father used to make us swelter in the summer because he didn't want to waste gas running the air conditioner. Of course, that was in the good ol' days, when "heavy metal" was used to refer to cars instead of music, plus, aerodynamics took a rumble seat to styling.
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Randy Johnson
3rd Registered Member 02-21-2001
First Member to Reach 10,000 Posts
First to arrive at the very first Reading Meet
Subaru Ambassador
1992 SVX PPG Pace Car Replica 110+k
1993 White Impreza L 240+K miles
2001 Legacy Outback Limited Sedan 250+K miles
2013 Deep Indigo Pearl Legacy 3.6R 49+K miles
"Reading is my favorite Holiday"
Mike Davis -- at Reading VI
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