Originally Posted by clutch
Myth Busters did an economy test with and without tailgates and found that mileage was better with a tailgate. There is probably very little difference with a cap, but when towing a cap can reduce turbulence between the truck and trailer.
This is where I was going. I can't afford the weight of a cap, but I need a tonneau for other reasons. I would never install it simply for the gas savings, I need to put stuff in my truck as a daily driver that I don't necessarily want exposed to the weather.
So I'm wondering if a tonneau cover will have some effect on the occurrence of turbulence between the truck and trailer since that is where a lot of inefficiencies come from? I know it wouldn't be as effective as a cap, but again, I don't have the weight surplus for a cap.
Really, I'm just curious, I'll find out for myself soon enough, just thought I would jump in here and expand the original discussion.
2014 Jay Flight 28 BHBE
2015 RAM 2500 6.4L HEMI, Tradesman 4x4, 3.73
Blue Ox SwayPro (BXW 1503)
Upgraded from an REI internal frame backpack and a Eureka 1/2 dome tent!