so out of curiosity, how much does the increased speed affect the mpg in a prius, in my transam (decent aero) i used to drive 90+mph and got around 24 mpg which is about the same as what i got at 65 (1 or 2 mpg less but to me thats not a big difference for the speed difference) but in comparison either of my boxes (jeeps) suffers greatly above certain speeds (55 for jeep 1 and 65 for jeep 2)
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