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 Post subject: Mileage With Roof Rack
PostPosted: Sun Apr 05, 2009 3:45 am 
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How much did your mileage decrease when you put on a roof rack?

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PostPosted: Sun Apr 05, 2009 12:29 pm 
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I went down about one maybe 2. I just got 15.6 mpg's on a trip to morgantown, WV all highway but in the mountains I'm running 245 75s. I will tell you I got 13 mpg once all highway on a trip after i put it on but IDK WTH happened with that.


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PostPosted: Sun Apr 05, 2009 12:46 pm 
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mount them down low not like some on top of roof cross rails and 6 inches above the roof line :roll: then a good deflector, ran a BMG basket for over 60,000 miloes and had it off one time, no real noticable decrease in mileage and it was handy to always have it up there to haul stuff.
The Rock Lizard Gecko same way maybe even better , can not tell its up there, trips I get 20 MPG pretty easy at 70 plus

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PostPosted: Sun Apr 05, 2009 4:20 pm 
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Yep, mine dropped down a couple also. I do have it mounted on top of the side bars though, with a fearing.

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PostPosted: Fri May 29, 2009 11:35 am 
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I never noticed a change in my gas mileage after putting a Surco roof basket on top of my Libby. Now that I carry my spare in the roof basket I imagine I'll see a small drop.

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PostPosted: Fri May 29, 2009 12:26 pm 
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tommudd wrote:
mount them down low not like some on top of roof cross rails and 6 inches above the roof line :roll: then a good deflector


Temporary hijack...

Tom - could you PM me with what you used/how you did your wind fairing when you get a spare second? :D Thanks!

/hijack

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PostPosted: Thu Nov 05, 2009 10:37 pm 
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any time I have the rack on I have a 17' kayak on it as well and I actually get better mpg. I think it breaks up the air suction behind the jeep.

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PostPosted: Fri Nov 06, 2009 2:24 am 
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I don't notice any drop with mine. It is very close to the roof and all round tubing. If any its less that 1 mpg. See signature link for info.

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 Post subject: Re: Mileage With Roof Rack
PostPosted: Tue Jan 05, 2010 2:06 am 
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-1 mpg for me. Thule roof rack, fairing, and big booty Thule aero box.

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 Post subject: Re: Mileage With Roof Rack
PostPosted: Tue Jan 05, 2010 5:25 am 
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well, i get about 14.5 MPG with the black widow and 4 lights :D

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 Post subject: Re: Mileage With Roof Rack
PostPosted: Tue Jan 05, 2010 3:16 pm 
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I lost around 3. My rack catches a lot of air. However, I also added skids at the same time. I figure at least 2-2.5 of that was the rack though.

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 Post subject: Re: Mileage With Roof Rack
PostPosted: Tue Apr 06, 2010 8:31 am 
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I have a surco rack that mounts on top of the roof rails (probably sits a total of 4 inches above the roof to the bottom side of the rack) and I have roughly a 3 mpg drop. I get roughly 19-20 w/o the rack and roughly 16-17 with the rack on.

I'm planning on fabbing up a custom wind deflector to help with this problem.

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 Post subject: Re: Mileage With Roof Rack
PostPosted: Tue Apr 06, 2010 9:55 am 
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Mine didn't drop noticeably when I installed mine. even with four big 'ole lights up there.

might have gone down 1

1.5 maybe

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 Post subject: Re: Mileage With Roof Rack
PostPosted: Fri Aug 27, 2010 3:32 pm 
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jmichaelsjeep wrote:
I have a surco rack that mounts on top of the roof rails (probably sits a total of 4 inches above the roof to the bottom side of the rack) and I have roughly a 3 mpg drop. I get roughly 19-20 w/o the rack and roughly 16-17 with the rack on.

I'm planning on fabbing up a custom wind deflector to help with this problem.

Dude, please let me know if you do and how it goes. My Surco is like a parachute. I was getting 19-20 as well. I've recently been getting 14-15 (partly because of all the construction on the interstate to and from work), but I would like to get one or two back.

New plugs (autolite dp), keep good air in tires, change oil, new filters, etc... . It is all the rack. Worth it though. There just isn't enough room in the KJ for the stuff needed for two kids under 2 years old. :dizzy:

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