5.7 hemi gas mileage - JeepForum.com

 
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post #1 of 8 Old 11-28-2007, 03:42 PM Thread Starter
tbta02
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5.7 hemi gas mileage

have 400 miles on my gc . im hoping to hear the gas mileage gets alot better . right now its pretty bad .

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post #2 of 8 Old 11-28-2007, 03:48 PM
Marcus86GLHS
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my 2008 has 405 miles so far: 12 mpg average but that is nearly all stop and go, very little steady highway driving........and yeah it better get better.

my 2004 4.7L H/O Limited got 17 mpg same conditions: very little highway.

2008 Hemi Grand Cherokee Limited 4 x 4, original owner, 29,000 miles
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post #3 of 8 Old 11-28-2007, 04:42 PM
Aloha8
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I've got 3000+ miles on my '07 Limited Hemi and am getting an average of nearly 16 mpg overall, calculated. Mostly around town driving - not rush-hour type traffic - with a few road trips, no interstate highway driving.

Last week, on a 160 mile round trip, mostly 2-lane highway driving and through a couple of smaller cities and towns, the Jeep reported 19.1 mpg. Putting 38 psi in the tires may have helped that... but mostly keeping my foot out of it helps the most.
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post #4 of 8 Old 11-28-2007, 05:00 PM
SAB30
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I do a LOT of highway driving.

I had a 2006 4.7L Grand Cherokee 75-80 mph on highway I would be lucky to get 17 mpg, usually I was around 16.5.

I am 3,000 miles into a 2008 5.7L Grand Cherokee. 100 to 500 miles was all highway and I was surprised that I got 17.3. I have been getting close to 17.3 - 17.5 on the highway since at about 75 mph.

Of course the better mileage is because of the MDS. The one complaint I have there is that it "lugs" a little. Kind of like a manual transmission that needs to be downshifted. The Jeep seems to try and hold the 4 cylinder fuel saving mode just a tad too long.
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post #5 of 8 Old 11-28-2007, 05:24 PM
ryanlberg
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Quote:
Originally Posted by tbta02
have 400 miles on my gc . im hoping to hear the gas mileage gets alot better . right now its pretty bad .
if you dont like bad gas mileage trade the hemi i get 250 miles to a tank with 50/50 city highway
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post #6 of 8 Old 11-28-2007, 06:08 PM
MarkoPo
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Good luck, I get avg. 14 to 15 on mostly back country roads. Doesn't make a difference what kind of gas I use either. I'm going to try a cold air intake and free flow exhaust and hope to improve a few MPG.

05 Grand Cherokee Limited 5.7 Hemi
06 pontiac Torrent AWD
96 Grand Cherokee Laredo 4.0 newest edition to the family.
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post #7 of 8 Old 11-28-2007, 06:20 PM Thread Starter
tbta02
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ok

Quote:
Originally Posted by ryanlberg
if you dont like bad gas mileage trade the hemi i get 250 miles to a tank with 50/50 city highway
did not buy this truck expecting great fuel economy . just trying to figure out what to expect in the future .the more miles per gallon the merrier.
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post #8 of 8 Old 11-29-2007, 12:31 AM
2008OverlandCRD
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I am getting rid of an 06 Overland 4x4 Hemi. The gas mileage has always sucked. Average 10 - 11 in town. I don't drive it too hard either, or at least I don't think I do. I get about 17 - 18 cruising 65 - 70 on the freeway.

Most people ask if that's the reason I am getting rid of it. I am not getting rid of it because of the gas mileage (gas is paid for by my company) just because my company gets me a new car every 2 years.
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