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Car or truck getting poor gas mileage? Check your mass airflow sensor first and save money on gas.
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DIESEL OWNERS: Do This To Double Your Fuel Mileage In 10 Minutes
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How did this gain me fuel economy!?
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More MPG EASY! How to Improve Gas Mileage - Chevy Silverado - 2007-2013
My Jaw Dropped When I Saw How Much My Truck’s MPG Improved WITH a Bed Tonneau Cover vs WITHOUT!
How You Can Considerably Improve Gas Mileage In Your Car
