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Information Junky
Join Date: Mar 2001
Location: an island, upper left coast, USA
Posts: 73,167
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Drive slower. Lose weight, Drive slower, run highest tire pressure, oh, and drive slower.
I just drove the west coast (2400+ miles) in my relatively aero Cayenne. 60mph got me ~24mpg, whereas 80mph was 17.4mpg
Anyway, aero drag goes up exponentially with speed.
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Everyone you meet knows something you don't. - - - and a whole bunch of crap that is wrong.
Disclaimer: the above was 2¢ worth.
More information is available as my professional opinion, which is provided for an exorbitant fee. 
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