Mythbusters had a segment on this, seems I remember no positive conclusion. I also remember reading that an auto club or university had tried to prove it would help and could not.
As to my own experience, I have never noted an increase in my 350/450 trucks mileage whether the sliding cover is open or closed. On 2 other trucks, I had fiberglass covers, and the weight of these would have negated any mileage gains.
Get one for security of items in the bed, not mileage...
Joe
__________________
'16 40QBH Phaeton
'21 Sahara HA toad
'15 38RSSA Mobile Suites--traded
'05 36TK3 Mobile Suites--retired but not forgotten
|