Quote:
Originally Posted by schaf921
Mythbusters did a show on this - they compared two trucks, one with tailgate down and one with tailgate up. The up tailgate formed a circular wind current in the front of the bed that provided more aerodynamics and increased MPH over the tailgate down. I would assume having the cover in place kills the aerodynamics formed as well. From their findings, I would say you should lose mileage with one installed
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Totally wrong comparison, the tailgate has nothing to do with the aerodynamics if you have a
tonneau cover. The whole purpose of the tonneau is to move said bubble of air.
I've always had tonneau covers on my trucks, I get better mileage but it isn't anything huge. It's not a whole lot but it translates to 10-20 miles more per tank. I figure that over the course of a few years, it will pay for itself and save me a little bit of money.
Even though it isn''t super secure, I'd rather not have people looking at the stuff in my bed. It also prevents jerks from throwing garbage in the bed when you are parked.
Since this thread was moved, I expect it to die off soon.