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-   -   very bad gas miliage (http://www.jeepforum.com/forum/f67/very-bad-gas-miliage-1398071/)

csgbenji 07-26-2012 08:06 PM

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

06WKHEMI 07-26-2012 08:23 PM

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

TurboDiesel 07-26-2012 08:26 PM

why did u make this thread 8 minutes after the other one?...

paroxysym 07-26-2012 08:44 PM

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

TurboDiesel 07-26-2012 09:09 PM

LOL that or they really wanna know!!!

csgbenji 07-26-2012 09:18 PM

sorry computer died as soon as I hit send. Didn't thing it went through the first time.

quicksilverado 07-26-2012 09:26 PM

The readout for mpg is way off. My last fill up it showed I was averaging 18.8 mpg. Hand calculation was 21.9.

kVon 07-26-2012 09:42 PM

Why do people focus so much on mpg when they drive an SUV? Why buy an SUV if every mile counts.

kllshadow 07-26-2012 11:12 PM

Quote:

Originally Posted by kVon (Post 13926564)
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...

cherrybomb05 07-26-2012 11:20 PM

Tune up, fluids, throttle body, what was mentioned above that I didn't say

elfirebird 07-27-2012 02:56 AM

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.

paroxysym 07-27-2012 05:07 AM

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.

JRLT 07-27-2012 08:55 AM

When was the last time your MPG indicator was reset?

paroxysym 07-27-2012 09:51 AM

Quote:

Originally Posted by JRLT (Post 13927978)
When was the last time your MPG indicator was reset?

my guess... when it left the factory :laugh:

Static83 07-27-2012 10:54 AM

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


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