» Posted by Martin Weil on June 20, 2008

or "How to save money on gas?

From Fueleconomy.gov

"While each vehicle reaches its optimal fuel economy at a different speed (or range of speeds), gas mileage usually decreases rapidly at speeds above 60 mph. You can assume that each 5 mph you drive over 60 mph is like paying an additional $0.30 per gallon for gas."

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