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-   -   Air dam affects on mpg (http://www.jeepgarage.org/f182/air-dam-affects-on-mpg-33360.html)

wmassWK 01-01-2012 08:31 PM

Air dam affects on mpg
 
This weekend I took a trip to Vermont. 4hrs each way. 1st 1.5hrs were highway cruising at 70ish and the rest were back roads running about 55mph. On the way up I averaged 19mpg and returning 20mpg. Normally I run with the air dam off and can get 22 - 23 mpg on the highway. Sometimes back roads driving gives me 24. For this trip the air dam went back on. Can this piece really cause such a difference in mpg. I know winter gas sucks with all the additives so I opted for 92 octane.

Thanks, Drew

Running 4.7l with SC Flashpaq and K&N intake. 2" Rc lift with 255/70 Destination ATs.

SvenskaJeepGuy 01-01-2012 08:40 PM

Re: Air dam affects on mpg
 
Quote:

Originally Posted by wmassWK (Post 543851)
This weekend I took a trip to Vermont. 4hrs each way. 1st 1.5hrs were highway cruising at 70ish and the rest were back roads running about 55mph. On the way up I averaged 19mpg and returning 20mpg. Normally I run with the air dam off and can get 22 - 23 mpg on the highway. Sometimes back roads driving gives me 24. For this trip the air dam went back on. Can this piece really cause such a difference in mpg. I know winter gas sucks with all the additives so I opted for 92 octane.

Thanks, Drew

Running 4.7l with SC Flashpaq and K&N intake. 2" Rc lift with 255/70 Destination ATs.


92 is a waste. i get 23 all the time on the highway in my wk and i have never taken my airdam off. the airdam is designed to not harm mpgs, so it should be a non factor. when have you even got 24mpg on backroads??

wmassWK 01-01-2012 09:45 PM

Re: Air dam affects on mpg
 
Usually going 45 to 55 I can to 24mpg.

Bikemobile 01-02-2012 12:31 AM

Re: Air dam affects on mpg
 
I see a 2 mpg increase with my airdam on vs off.

TurboDiesel 01-02-2012 01:06 AM

Re: Air dam affects on mpg
 
i choose looks over MPG lol

SvenskaJeepGuy 01-02-2012 03:12 AM

Re: Air dam affects on mpg
 
Quote:

Originally Posted by Bikemobile (Post 543929)
I see a 2 mpg increase with my airdam on vs off.

The 08-10 airdam isnt big enough to make that substantial of a difference

wmassWK 01-02-2012 09:21 AM

Re: Air dam affects on mpg
 
Isn't the air dam designed for better aerodynamics on stock vehicles? Wouldn't a lifted and leveled Jeep be affected differently?

Bikemobile 01-02-2012 10:52 AM

Re: Air dam affects on mpg
 
Quote:

Originally Posted by SvenskaJeepGuy (Post 543964)
The 08-10 airdam isnt big enough to make that substantial of a difference

Do you have a 2008+ or are you basing this on your extensive aerodynamics experience?

http://www.jeepforum.com/forum/f67/t...l#post12761617

http://www.jeepforum.com/forum/f67/t...l#post12760330

SvenskaJeepGuy 01-02-2012 01:34 PM

Re: Air dam affects on mpg
 
Quote:

Originally Posted by Bikemobile (Post 544110)
Do you have a 2008+ or are you basing this on your extensive aerodynamics experience?

http://www.jeepforum.com/forum/f67/t...l#post12761617

http://www.jeepforum.com/forum/f67/t...l#post12760330


i guess you have never seen my jeep

http://www.jeepgarage.org/picture.ph...pictureid=1412


as stated above, the airdam is installed to improve the aerodynamics

TurboDiesel 01-02-2012 02:26 PM

Re: Air dam affects on mpg
 
If my air dam were painted I'd probably have it on lol but its not...just plastic

SvenskaJeepGuy 01-02-2012 02:30 PM

Re: Air dam affects on mpg
 
Quote:

Originally Posted by TurboDiesel (Post 544217)
If my air dam were painted I'd probably have it on lol but its not...just plastic

paint it yourself, it is easy

TurboDiesel 01-02-2012 02:45 PM

Re: Air dam affects on mpg
 
With spray paint? I guess I could, I got gloss black and adhesion promoter


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