very bad gas miliage - JeepForum.com

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post #1 of 17 Old 07-26-2012, 08:06 PM Thread Starter
csgbenji
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very bad gas miliage

I just bought a 2005 Grand Cherokee Laredo Rocky Mountain 4.7L V8 with 98,000 miles. The dealer is saying that it should get 16/17cty and 20/21Hwy. However, I've driven roughly 90 miles combined in the 4 days I've had it and the MPG average indicator says I'm only getting 13.3 right now. That is with 40 highway miles and the rest stop and go city. Should I take it back and have them fix something or is this what I should be expecting, in which case I will be trading it back for something smaller like a patriot. Driving for work I will be filling it about every other day and I cant afford that.

Perplexed

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post #2 of 17 Old 07-26-2012, 08:23 PM
06WKHEMI
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What size tires does it have? If they are bigger than stock that calculator will read low.. it could also be due for a tune up if do a few easy things like plugs, egr, pcv and clean the throttle body that should help a little at least

2006 Black wk overland HEMI QDII. OME HD bilstein struts with 58643 monroe load levelers RRO uca, afe cold air intake,hella 500FF behind grille, RC 1.5 wheel spacers s4xc cb antenna mount with 5ft firestik and midland 1001wx CB,265/70-17 falken rockymountain ats, pinch weld mod, door lock mod, Rola basket with 2 Hella 500 FF`s.
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post #3 of 17 Old 07-26-2012, 08:26 PM
TurboDiesel
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why did u make this thread 8 minutes after the other one?...

2008 CRD // GDE Eco // DPF delete // 3" intercooler // OME HD // 265 dirtytracs etc.
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post #4 of 17 Old 07-26-2012, 08:44 PM
paroxysym
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Quote:
Originally Posted by TurboDiesel
why did u make this thread 8 minutes after the other one?...
Wondering the same damn thing... Apparently one wasn't enough

2007.5 WK Laredo 4.7
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post #5 of 17 Old 07-26-2012, 09:09 PM
TurboDiesel
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LOL that or they really wanna know!!!

2008 CRD // GDE Eco // DPF delete // 3" intercooler // OME HD // 265 dirtytracs etc.
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post #6 of 17 Old 07-26-2012, 09:18 PM Thread Starter
csgbenji
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sorry computer died as soon as I hit send. Didn't thing it went through the first time.
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post #7 of 17 Old 07-26-2012, 09:26 PM
quicksilverado
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The readout for mpg is way off. My last fill up it showed I was averaging 18.8 mpg. Hand calculation was 21.9.

07 Grand Cherokee Limited CRD 4X4 GDE tune
00 Silverado 10 sec work truck
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post #8 of 17 Old 07-26-2012, 09:42 PM
kVon
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Why do people focus so much on mpg when they drive an SUV? Why buy an SUV if every mile counts.

2005 WK 3.7 Laredo Rocky Mountain - 255/70R17 Grabber AT2 - RC 2" BB - Spidertrax 1.5" spacers - Bilstein HD & MLL - Rola roof basket - Midland CB w/2' Firestik - Solid Rear diff cover
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post #9 of 17 Old 07-26-2012, 11:12 PM
kllshadow
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Quote:
Originally Posted by kVon View Post
Why do people focus so much on mpg when they drive an SUV? Why buy an SUV if every mile counts.
Why not try to get every mile out of it that you can and save yourself money...

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post #10 of 17 Old 07-26-2012, 11:20 PM
cherrybomb05
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Tune up, fluids, throttle body, what was mentioned above that I didn't say

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post #11 of 17 Old 07-27-2012, 02:56 AM
elfirebird
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I got a solid hand calculated 17mpg on a 120 mile trip the other night. EViC never went higher than 16.5mpg, and I've got a 3 inch lift, and my Trail Grapplers weigh something like 70lbs a piece.

2005 WK Limited Deep Beryl Green Hemi QD2 - Daystar, Bilsteins and MLL - 265 70 17 Toyo AT II - Black Rock Viper Black wheels - Aq1200D + SDC2.512 = 870 watts RMS
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post #12 of 17 Old 07-27-2012, 05:07 AM
paroxysym
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go back to the dealer if youre not happy and request a maintenance history or report. my guess is they did the usual maintenance befoire selling the WK- and oil change, rotate the tires, top off all fluids. if it needs a tune-up i doubt they will give it one. if the diff fluids or any other fluids need changed and its not hindering the performance, as in it makes the vehicle run or sound like crap.. they prob wont do anything about it.

so if you want better gas mileage, you may have to get your hands dirty and start doings ome maintenance on your own.. or take it back.

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post #13 of 17 Old 07-27-2012, 08:55 AM
JRLT
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When was the last time your MPG indicator was reset?

2010 3.7L, 4XGuard Matrix, Fastman TB, TB Ground Mod, Injen CAI, 255/60/18 Nitto Terra Grapplers, Bilstein Shocks & Struts, Cruiser Alloy Wheels - Switchblade, Stillen Brakes, Cargo Light Strip Mod, Electric Ashtray Mod, Jet-powered, Monkey Navigated...
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post #14 of 17 Old 07-27-2012, 09:51 AM
paroxysym
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Quote:
Originally Posted by JRLT View Post
When was the last time your MPG indicator was reset?
my guess... when it left the factory

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post #15 of 17 Old 07-27-2012, 10:54 AM
Static83
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I've got a 2005 4.7L with 72k miles. I have 255/75 tires and an OME HD lift with a superchips tuner. I get about 13-14 mpg in town and 18 on the highway. Pretty sure the Hemi gets better MPG with MDS

Stock for now
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