Tonneaus
Our new truck doesn't have a tonneau cover for the bed, and we're thinking that it would probably improve aerodynamic performance (and mileage) if it did. Does anyone have experience with adding one ...
Forum Discussion
Mythbusters did a piece on this and it had virtually no impact on mileage. I had one on my truck for awhile and liked it. It allowed me to keep things in the bed without worrying about them being stolen. Mine wasn't completely weather tight, so I couldn't put groceries back there if it was raining.
