Topper while pulling TT help MPG?
I'm curious has anyone had experience with a topper while pulling a TT? How does it effect MPG vs. no topper? I'm thinking a truck with a high topper would help make the truck/TT combo more aerodynam...
Forum Discussion
camp-n-family wrote:
This was proven to be untrue. Air over the cab would flow into the uncovered bed and cause an eddy effect which would then deflect air over the bed of the truck. It actually reduced drag. This is why it is better to drive with the tailgate up instead of down. A covered bed had minimal to no effect on improving aerodynamics. I believe there was even an episode on myth busters about this.
https://youtu.be/r3aqHbD-O9E
Not just Mythbusters. Both Ford and General Motors did their own wind tunnel testing and found tailgate up gives better mileage. But some old internet myths never die.
