Roof mounted light bar MPG test.

[Gears and Gadgets]

I couldn’t really find any good information out there on MPG impacts from a roof mounted light bar. There was a bunch of guesses on random forums but I didn’t really see any legit real world testing so I put a video together to share the results. 

 

 

[Buckshot556]

Wow, great test!  1.5 mpg is definitely substantial for such a small change.

How do you have the bar wired?  Do the wires run into the truck through the third brake light?