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PostPosted: Tue Oct 13, 2009 3:14 pm 
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2006 Renny, ave.19-21 mpg, K&N filter and Slick 50 :lol:


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 Post subject: Re: Why does the 3.7 Liberty's MPG suck so bad ??
PostPosted: Thu Mar 11, 2010 11:02 pm 
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Because its a gasser. My brothers wifes Xterra gets 12-15 MPG. I friends Four(skin)Runner gets 16MPG, my buddies gasser Liberty gets in the 15 range. No gasser SUV dose well in the mileage realm.

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 Post subject: Re: Why does the 3.7 Liberty's MPG suck so bad ??
PostPosted: Thu Apr 29, 2010 7:20 pm 
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Location: N. Texas (Granbury)
Hey Guys
I bought my Liberty new in '05 and have 31,500.0 miles on her. I've kept pretty good records and my average MPG (city/town/hwy) is 21.56 for the total time I've owned her. I just sprung for GDE Eco-Tune, and I'm hoping the mileage will get even better.
Update
Well I've had the GDE-Eco Tune installed for about 6 months now and I've seen a 10% increase in Fuel mileage and much better response in the all-around driving. I made a trip to FL a while ago and actually saw 27 MPG on one tank of fuel!

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Last edited by Evanslmtd on Mon Sep 20, 2010 6:57 am, edited 1 time in total.

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 Post subject: Re: Why does the 3.7 Liberty's MPG suck so bad ??
PostPosted: Sun Sep 19, 2010 10:49 pm 
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I live in the mountains at around 3000ft, and the roads are steep, and most of my driving is between that and 4500ft. So, for me, with 265/70/15 tires and a 3" lift, my Limited gets around 10mpg. I dont really get to the freeways often so I dont know what sea level mpg or hwy mpg would be. Also, I have some really heavy stereo equipment (80lbs of subs, 70lb box, and the rest of the gear), so that may contribute to poor mileage too. oh yeah, the arb bump and winch also takes away. But I have a k&n filter, so I gain 1 mpg haha.


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 Post subject: Re: Why does the 3.7 Liberty's MPG suck so bad ??
PostPosted: Fri Nov 05, 2010 12:32 am 
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Location: Tucson, AZ
i have an 04 kj sport 2.5 inch skyjacker lift and offroad terrain tires. mileage hasnt changed much since i did that.. i get around 20 mpg. i have about 90,000 miles, give/take some miles.. i used to get around 21 mpg. it cost me about 30 dollars to fill up my tank once a week..thanks to costco gas and living in tucson

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 Post subject: Re: Why does the 3.7 Liberty's MPG suck so bad ??
PostPosted: Fri Nov 05, 2010 9:11 am 
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Location: Upstate NY
Was 20mpg with 99% highway driving during the summer. Now down to 18mpg or so due to cooler weather. It will get worse in the dead of winter.

The KJ is a heavy pig and as aerodynamic as a cinder block but I love the "Porky POS"......haha


:JEEPIN:

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 Post subject: Re: Why does the 3.7 Liberty's MPG suck so bad ??
PostPosted: Sat Nov 06, 2010 11:40 pm 
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Location: Somerset, Kentucky
guys...

I say I get 17 mpg or less with my libby

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 Post subject: Re: Why does the 3.7 Liberty's MPG suck so bad ??
PostPosted: Sat Nov 06, 2010 11:52 pm 
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Weight of the shoe has a lot to do with it..

Miss Leadfoot ;)



I might get 19 on the highway at a consistent 65-70 with no stops for anything but the next tank of gas

I think I actually average in mixed driving 16-17, it's been rare to have a mixed tank average more than 17.3

and i could really care less :)

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Command Trac / 4.10s
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 Post subject: Re: Why does the 3.7 Liberty's MPG suck so bad ??
PostPosted: Sun Nov 07, 2010 9:10 am 
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Location: Somerset, Kentucky
partly leadfoot and partly where i live, i have to drive far to get where i'm going. i usually run 60mph in a 55. sometimes i run 65 or 70mph. gas where i live is almost $3/gal. overall i don't care what mpg i get with my liberty, i will still drive it!

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 Post subject: Re: Why does the 3.7 Liberty's MPG suck so bad ??
PostPosted: Thu Jun 16, 2011 8:01 pm 
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215/85 e rated duratracs, no lift, 3.7 auto. I get 16-18mpg. Most tanks I get around 16.7mpg. I want to lift it and put soft8s on but I'm scared to kill my decent mpg.

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 Post subject: Re: Why does the 3.7 Liberty's MPG suck so bad ??
PostPosted: Thu Jun 16, 2011 8:35 pm 
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Location: LOST in GEORGIA&FLORIDA!
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2011 LTZ CrewCab Z71 4x4 Silverado.
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 Post subject: Re: Why does the 3.7 Liberty's MPG suck so bad ??
PostPosted: Fri Jun 17, 2011 12:23 am 
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Avg.12.7

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 Post subject: Re: Why does the 3.7 Liberty's MPG suck so bad ??
PostPosted: Fri Jun 17, 2011 7:27 pm 
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Mine is switched. 16-17 in town and 14-15 on the highway. :roll:

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Pastafari Alum, Pink shovel recipient


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 Post subject: Re: Why does the 3.7 Liberty's MPG suck so bad ??
PostPosted: Fri Jun 17, 2011 8:17 pm 
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Location: Metro Detroit
Now since its summer, I'm starting to get 18 MPG. I'm happy with that since our Jeeps are real trucks unlike the Rav4 and Escapes that people try to compare the Jeep with.

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2010 Jeep Liberty 4x4 Brilliant Black Crystal Pearl
Current mods: 6000K HID low/hi beams; Passport 9500i; CB radio
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 Post subject: Re: Why does the 3.7 Liberty's MPG suck so bad ??
PostPosted: Mon Sep 05, 2011 11:17 am 
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Location: San Diego, CA
Three tanks so far on 05 CRD, all over 500 miles:
28/31 (hand calculated vs overhead computer)
27/30
27/33 (not sure why the computer was so much off, this was 90% highway, so I expected a little better)

Stock everything. Looking forward to exhaust and GDE tune to increase mileage. I drive slow, this replaced a prius...which was rearended 3 times in 2 years, wanted something heavier for crash protection.

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05 Liberty CRD Ltd - GDE ECO Tune, timing belt, metal glowplugs, Magnaflow 12226, homemade roofrack, 84k miles, SAMCOs, Fumoto, Amsoil EAA201, flat tow setup
02 Ford F350 7.3 Powerstroke -leveled, CC longbed, Detroit Lockers F&R, G38 Turbo, 4" MBRP 290k miles
87 Suzuki Samurai - VW 1.6NA Diesel, SPOA
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 Post subject: Re: Why does the 3.7 Liberty's MPG suck so bad ??
PostPosted: Sat Sep 10, 2011 3:17 pm 
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fastring wrote:
Three tanks so far on 05 CRD, all over 500 miles:
28/31 (hand calculated vs overhead computer)
27/30
27/33 (not sure why the computer was so much off, this was 90% highway, so I expected a little better)

Stock everything. Looking forward to exhaust and GDE tune to increase mileage. I drive slow, this replaced a prius...which was rearended 3 times in 2 years, wanted something heavier for crash protection.

The more highway mileage, the more the computer is off. Gets a little worse after the GDE tune.

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2006 Jeep Liberty CRD, Limited
GDE Eco Tune, GDE TCM Tune, Bauer 203* Tstat, Amsoil EaA 201 Filter, Clean MAP, Samco CAC Hoses, Magnaflow Muffler #12226.
New Mopar Fuel Filter, K&N Filterminder, Fumoto Oil Drain Valve
225/75R16 Hankook Dynapros


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 Post subject: Re: Why does the 3.7 Liberty's MPG suck so bad ??
PostPosted: Sat Dec 10, 2011 8:34 pm 
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Location: Cincinnati
I was averaging 17 mpg city/highway then I installed a Frankenlift II and 245/75/16's one of which is on the roof and now I'm lucky to see 14 mpg.

Rock and roll! :rockon:

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2004 Black Jeep Liberty Renegade 4x4 3.7L
Frankenlift II Baja
245/75/16 General Grabber AT2's

Headlights-3000k HID...illegal
Fog Lights-3000k HID...illegal
Tail Lights- black nightshade...illegal
Turn signals- clear lens w/ clear bulb...illegal
All windows- 5% tint...illegal

Cop following me...CRAP


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