How much extra gasoline would Americans use if daytime running lights were mandatory? | HowStuffWorks - discu.eu

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If daytime running lights were mandatory in the U.S. and all vehicles had them how much extra gasoline would that use each year? http://auto.howstuffworks.com/question424.htm 29 comments 15/2/2008 science

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How Gas Prices Work | HowStuffWorks http://money.howstuffworks.com/gas-price.htm 2 comments

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Royalty Free Stock Photos, Illustrations, Vector Art, and Video Clips - Getty Images http://www.gettyimages.com/ 3 comments
Fuel Economy http://www.fueleconomy.gov/ 2 comments

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