08 overland GC, new vehicle mpg update ect.. - JeepForum.com
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post #1 of 24 Old 01-28-2008, 07:46 PM Thread Starter
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08 overland GC, new vehicle mpg update ect..

okay, im posting this to help potential buyers ect. i was really hesitant about getting the hemi becuase of poor mpg. well here is the break down.

08 overland GC with hemi. i live in michigan. its been about zero deg. lately. WITH remote starting every morning for about 10 min. and maybe some other times throughout the week. driving is about 40 miles round trip to work and back. about 50/50 highway/city. highway driving set on 70mph.with 800 miles showing on the odometer i have been getting 13.5. frankly i am astonished at the kind of mpg im getting on a brand new vehicle with a bad history of crappy mpg. im thinking that number would jump to about 15mpg after my oil change to synthetic and not letting remote start burn the gas.

oh, i did add a reg. k&n air filter.also, that is no lead footing ect...

hope this helps

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post #2 of 24 Old 01-29-2008, 01:41 AM
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I have 560 miles on my 08 Overland 4x4 CRD and somewhat similar driving conditions as the previous post, some remote starting warm-ups, but slightly warmer temps and more in town driving (about 80% in town / 20% highway). Mine is all stock, no mods at all.

The computer is showing an average of 23 MPG, which I think is slightly lower than the actual mileage.

Good comparison between the Hemi and CRD though.
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post #3 of 24 Old 01-29-2008, 02:40 AM
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big fan of the hemi WK, i just rolled 1,000 miles, about 90% of that stop-and-go driving, manually calculated a little over 15 mpg for those first 1,000.

but honestly, considering the MDS activates so often (the "Fuel Saver" message appear in my display a lot), i am not impressed with this at all. i'll live with it fine since i drive less than 7,000 miles/year, and enjoy the power of the hemi option.

2008 Hemi Grand Cherokee Limited 4 x 4, original owner, 29,000 miles
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post #4 of 24 Old 01-31-2008, 04:58 PM
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My 2008 has 420 miles on it. Fuel Saver is indicating 15.2 MPG on second tank of gas now traveled 220 miles, and indicates 80 miles to empty. Have not calculated actual MPG as of yet, but will upon filling up this nearly empty tank. From the looks of it 15.2 is probably accurate. I have been driving mostly highway.

2008 Grand Cherokee LImited 4x4, Hemi
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post #5 of 24 Old 01-31-2008, 06:11 PM
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Wait for it to break in. My father's '06 with the 4.7 was getting about 13 when he first got it. He now averages 16-17 mpg regularly, and almost 20 on highway trips.

Give it a couple thousand miles. It'll go up. Also, try calculating by hand, it's a bit more accurate. I've found that the VIC is off quite often.

And with the remote start, that'll throw your MPGs way down. I was averaging about 12 over winter break. Started my WJ every morning and let it run about 10 min. Sucks the gas more than you can imagine.

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post #6 of 24 Old 02-01-2008, 03:14 AM
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I traded in the 4.7 it was getting between 20-23 on highway. Not a bad engine either, got the job done. To see this 5.7 getting 15mpg is discouraging to say the least. No wonder Jeep is offering lifetime power train warranty, nobody will want to keep the car in a few years when gas prices are out the ceiling.
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post #7 of 24 Old 02-01-2008, 09:41 AM Thread Starter
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yeah, being its around 0deg. in michigan lately . im thinking without using the remote start in the warmer months it should get around 15mpg mixed or more..

to my calculations the vic is spot on with the avg. mpg and what i calculated...
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post #8 of 24 Old 02-03-2008, 01:49 AM
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Filled it up and it was 15.1 mpg, computer indicated 15.2.
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post #9 of 24 Old 02-04-2008, 05:30 AM
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Just to make everyone feel better, my "new" 07 Overland is getting around 9.5 mpg on the computer around town! My wife is driving it, so I can only guess how it's being driven.

However, I didn't buy it for gas milage, and it replaced a Discovery and has about twice the horsepower and torque. The main reason that I love this thing so much is that my wife was rear ended while at a stop light at 8+ months pregnant with my 3 year old in the truck also, and everyone is fine. I can't even think about what might have happened in a really light "efficient" vehicle.

Happy to pay for the gas,

2007 Overland 20K
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post #10 of 24 Old 02-04-2008, 11:00 AM
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i've got a 05 hemi limited with a k&n and catback exhaust, and i feel like the fuel mileage is horrible, i'm gettin roughly 350km per tank. i know my truck is supposed to have the "mds" but am i supposed to have a dashlight indicate when its working? i think i can feel it when its working cuz theres a slight hesitation when im just cruising between 40-60 mp/h. but i have a friend with a awd dodge ram hemi, and his truck tells him whenever the mds is active
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post #11 of 24 Old 02-04-2008, 04:19 PM
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My '07 GCL is currently showing 11.1 mpg (yeah, you read that right 11.1) on the clock, with 29,000 on it so far... It's going into the shop Friday to get that taken care of. Has anyone else seen numbers that low?
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post #12 of 24 Old 02-04-2008, 04:41 PM
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When I drive it city it reads 9-10mpg. Brand new with only 470 miles on odomter.
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post #13 of 24 Old 02-04-2008, 05:57 PM
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I get 8-10 in NYC traffic, do you live in a big city? If you do then that is normal.

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post #14 of 24 Old 02-05-2008, 07:04 AM
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Hi Folks
07 GC with ~8500 miles on it. I reset MPG indicator about ~2000 miles ago. The Jeep gets driven about 50/50 city/highway. I am averaging about 15.6 MPG which isnít bad. Highway driving is about 70-80 mph and city is less than 35 mph.

PS: my 96 GC with a 318 V8 was only averaging 14.7 MPG in the same driving conditions. I believe the 07 is heavier.
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post #15 of 24 Old 02-16-2008, 02:39 PM
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FYI, I Just took long trip averaged 18.3 according to computer, but actually was 17.7mpg using my calculator. It seems that by turning off the option for Hill Incline/decline MPG goes up 2-3mpg. Previously I was getting around 15mpg highway. Hope it helps someone.
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