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Does FJ Air Dam Help Fuel Mileage vs Just The OEM Roof Jack

4 messages,  Last post on Feb 01, 2013 at 8:59 AM

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What is this discussion about? Toyota FJ Cruiser, SUV

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#1 of 4 Does FJ Air Dam Help Fuel Mileage vs Just The OEM Roof Jack by mwhunter1

Apr 05, 2008 (5:37 pm)

I've seen several posts on these forums that talk about the FJ's roof rack knocking off as much as 2mpg. I can understand the drag factor due to the design of the rack, but then I see the 2008's have what appears to be a new "Off Road Lights With Air Dam" option. It would seem to make sense that the addition of the roof rack with the air dam/lights set up would help airflow over a otherwise chunk of tubular metal parked on your roof.
 
Has anyone had the air dam/lights option installed and then seen any difference in their mpg vs the install of the standard roof rack ~ or am I just dreaming?

#2 of 4 Re: Does FJ Air Dam Help Fuel Mileage vs Just The OEM Roof Jack [mwhunter1] by Stever@Edmunds HOST

Apr 05, 2008 (11:18 pm)

Replying to: mwhunter1 (Apr 05, 2008 5:37 pm)
While waiting for responses from other FJ owners, check out We Test the Tips Part II.
 
"Adding a roof rack (cross rails) and driving with cruise control at 65 mph caused a 1 percent loss in fuel economy than driving at the same speed without cross rails."

#3 of 4 Re: Does FJ Air Dam Help Fuel Mileage vs Just The OEM Roof Jack [steve_] by shoozie

Nov 05, 2008 (1:06 am)

Replying to: Stever@Edmunds (Apr 05, 2008 11:18 pm)
Have the Air Dam with light kit on order. I'll let ya'll know. I can't imagine it wouldn't help MPG> All I can say is that for as much as it cost, IT BETTER!

#4 of 4 Re: Does FJ Air Dam Help Fuel Mileage vs Just The OEM Roof Jack [shoozie] by bmceachen

Feb 01, 2013 (8:59 am)

Replying to: shoozie (Nov 05, 2008 1:06 am)
Hey Shoosie. What did you find out on your mileage? Thanks. Bob

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