Just seeing if there is anyone out there that experienced any positive or negative changes in their mileage after they put a tonneau bed cover on?

Also what kind would you suggest for a 6.5ft bed? I like the ones that come apart in solid pieces (not big on the fabric covers).

Sorry if this topic has already been covered in this section, I wasn't able to find it.

 

Myth Busters settled this long ago, no milage gain from either a cover or tailgate down, in fact there was a loss of milage with the gate down, very small loss but a loss none the less.

Mark

 

Makes absolutely no difference. The Aerodynamics of these trucks are such that the tailgate does not cause drag ( mostly a urban myth ). If anything the extra weight would most likely very slightly reduce your mileage ( Hard to measure though )...

 

i couldn't say about mileage but i know that it's a lot quieter with the rear slider open and no more leaves and crap blowing into the cab from the box

unless myth busters checked every type of pickup I wouldn't generalize with their conclusions.

 

I did my cover and drop at the same time and did pick up a little, maybe like .3 mpg. And as Darrenmv said, hardly any noise with the slider open.

 

If anything I've lost mpg. Used to get around 16.5 before the Extang cover now I get 14.5

 

I went from a. Solid 17.1 to 18.3 steady after adding my bakflip cover. Plus its a solid cover as you said you liked

 

I put the Extang on mine the week I bought it so I can't compare apples to apples.

On my previous truck, `03 Tundra extended cab, the cover upped mi MPG by just short of 1 MPG.

 

If you built a rear bed cover that sloped down from the roofline to the tailgate (12% is optimum) you would see some results...but it would be pretty fugly.

 

There is a member of this forum who is a hypermiler that made a prototype cover just like that. The prototype wasn't too terribly ugly, but there was definetly room for improvement on a production version...