All I know about that is, the people who design trucks, take that factor into consideration.
My answer... get a tonnaeu cover!! My truck came with one when I bought it, so I don't know what it gets without it, but I know that I get almost 20 mpg. That's averaging highway miles, and city travel.
That's just my 3.9cents on the subject.
Kevin Lee
Tampa, Fl.
e-mail: k_lee54@juno.com
1998 Black Dakota Sport
3.9L V6
3.55 Rear End
Electric Sunroof
Soft Tonneau
Bug Deflector
10 CD disc changer
web page: http://homestead.juno.com/k_lee54/Index.html
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