Originally Posted by DodgieDan
Mythbusters did a test on MPG increase or decrease, and the results were not conclusive, in other words a tonneau does not help increase your miles per gallon or in my case litres per kilometer.
I was hoping someone else would post this so I avoid the 'nerd' comment LOL But yeah I watched the same episode. Tonneau's do not increase gas mileage but, they do keep your stuff safer and in the winter there's no snow blowing around in the box wich helps rear visibility, and not as much weight in the box weighing down the suspension.
I plan on getting one...just not sure if I wanna go with a 1 peice fiberglass one or a roll up version. In my mind if I am gonna use the box, I am going to b e using the whole thing so the size of the cover wont matter.