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some of their posts are entertaining
Adding weight to a vehicle never improves fuel mileage.
People assume that the box of a truck and tailgate creates drag. A vacuum is created behind the cab that actually helps fuel mileage.
Throw some straw in the box and see what happens. The straw will move to the front of the box and not be piled against the tailgate.
When Mythbusters revisited the fuel mileage myth the only thing that improved mileage was using a mesh tailgate.
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