MythBusters already did this... all myths busted.. tailgate down, no tailgate and cover... none helped mileage

 

0%

 

And you base this one what?

 

I know it sounds hard to believe , seems like it defys aerodyamic logic but I seen scientific studies where without it creates a bubble effect over bed....if you look hard enough I'm sure you could find it, buy if you need not for gas savings.

 

absolutely nothing... just trying to see how long until someone got their panties in a wad... I drive an EB btw!

 

Well, me speculating, they increase aerodynamic efficiency but not enough to really make a difference in fuel economy. BUT, if it's enough to keep the engine from going into boost at slightly higher loads/inclines, it could make a bigger difference.

But still not enough to appreciably save money on gas. Who's really going to notice the difference between 18mpg and 17.5mpg?

 

Actually, based on wind tunnel testing, the cover is equal to the bubble created in an open bed at highway speeds, so it is pretty much a wash.

Now if you take the tailgate off, drive a few tanks and record fuel use, then put the cover on, and the tailgate, you will see the increase in MPG. This has been proven by the Mythbusters. In reality, cover companies just use it as a marketing tool.

 

Actually most of them don't even try to make the claims anymore.

 

Mythbusters said the only one that helped was the tailgate net. It allowed some air to pass through it while still creating the bubble effect. However, that's not really an option with today's tailgates....you'd lose your camera and light tailgate light. I'd rather take the mpg hit than deal with removing and replacing my tailgate.

 

So, Mythbusters is the only credible source of data in this discussion?