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  #13  
Old 01-28-2013, 07:18 PM
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Re: 5.7L vs 3.6L Actual MPG?

I have the 5.7L and it has way more power than the 3.6L. I also get way more MPG's as well!!!



















Nah... I do have the 5.7L though. I average about 16 around town and that is the average. Not the best at any given time but the AVERAGE.
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  #14  
Old 01-28-2013, 08:11 PM
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Re: 5.7L vs 3.6L Actual MPG?

I average (real) 20-21 hwy and 15 in local rural driving. This is based on actual usage sampled from time to time, not just on the EVIC. I'm also not heavy on my foot nor do I exceed 70mph on the highway except in a rare passing moment.
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  #15  
Old 01-28-2013, 08:16 PM
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Re: 5.7L vs 3.6L Actual MPG?

Quote:
Originally Posted by Jim_in_PA View Post
I average (real) 20-21 hwy and 15 in local rural driving. This is based on actual usage sampled from time to time, not just on the EVIC. I'm also not heavy on my foot nor do I exceed 70mph on the highway except in a rare passing moment.
That's about what I get with my V6, 300hp, MDX. I'll be real happy to get that.


.


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Old 01-28-2013, 08:55 PM
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Re: 5.7L vs 3.6L Actual MPG?

Bill, the Hemi will suck gas like no tomorrow in heavy, slow, city traffic, but it's quite efficient (for it's ilk) for non-"stop & go" traffic and true highway driving. I've learned to drive with an easy foot most of the time over the years and it does pay off now. With your new MY14 Overland and the 8 Speed, you certainly have the potential to do even better than I'm experiencing!
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  #17  
Old 01-28-2013, 09:11 PM
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Re: 5.7L vs 3.6L Actual MPG?

Here's what mine looks like:

<a href="http://www.fuelly.com/driver/SMG/grand-cherokee" target="_blank"><img src="http://badges.fuelly.com/images/sig-us/116289.png" width="500" height="63" alt="Fuelly" title="Share and compare MPG at Fuelly" border="0"/></a>
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  #18  
Old 01-28-2013, 09:27 PM
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Re: 5.7L vs 3.6L Actual MPG?

I run 19-20 in town and 23-24ish on the Interstate. Would do better on the highway with air off and if I drove slower.
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  #19  
Old 01-28-2013, 10:20 PM
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Re: 5.7L vs 3.6L Actual MPG?

Quote:
Originally Posted by bill_de View Post
That's about what I get with my V6, 300hp, MDX. I'll be real happy to get that.


.

Those J37 engines IMO are just too high strung to motivate the MDX. Or rather the MDX is too heavy for them. My last vehicle has a J35, and granted it was much lighter it had way worse aerodynamics, only 5 gears, and terrible engine management. It still managed 28-30mpg highway with AWD.

It was a perfect engine for that vehicle. The J35 was so high strung you had to rev the bejesus out of it, and when you did it opened up a world of sound and noise and wonder. So much fun. Not a super fast vehicle, but it sure as heck was fun.
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  #20  
Old 01-29-2013, 12:25 AM
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Re: 5.7L vs 3.6L Actual MPG?

20-21 hwy driving +/- 75mph
17mpg hwy driving same speeds with winter gas and winter tires

Dont bother keeping track of city stop and go driving. Too depressing.
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Old 01-29-2013, 09:29 AM
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Re: 5.7L vs 3.6L Actual MPG?

Quote:
Originally Posted by jd2012jgc View Post
20-21 hwy driving +/- 75mph
17mpg hwy driving same speeds with winter gas and winter tires

Dont bother keeping track of city stop and go driving. Too depressing.
Lol, right? I really don't keep track of mpg's anymore except when on road trips. Once I move the registration on my accord over to VA I'll be driving that to work and the Jeep sitting wasting no gas lol. except for on the weekends.
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  #22  
Old 01-29-2013, 09:34 AM
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Re: 5.7L vs 3.6L Actual MPG?

Ive been getting 16 mpg city and 23 mpg city on my Hemi with conservative driving, i get a little less when i put my foot into it... 14-20

The v6 Wk2 i had was getting 15-23 but it had to struggle to keep up speed and was always downshifting which made it feel underpowered for 290hp

The Hemi barely has to downshift and seems to be a very smooth engine, and it doesn't bog down like the V6.
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  #23  
Old 01-29-2013, 10:21 AM
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Here's real data for you. 2012 Limited 5.7 Hemi fuel log for the last 30 days with very mixed city/hwy all 87 octane.

ForumRunner_20130129_090945.png

I've tracked since new and at 7500 miles she's averaged 14.79mpg overall.


Screenshot_2013-01-29-09-15-11-1.png

Edit: I use the Fuel Log app on Android in case anyone's interested.
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  #24  
Old 01-29-2013, 03:50 PM
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Re: 5.7L vs 3.6L Actual MPG?

Here is some real, hand-calculated data for the v6. I will download that Fuel app though, and start using that. What I've been doing is just using the calculator on my phone (miles / gallons = mpg) and then taking a screenshot. The image below is a screen shot of my last 12 screen shots (if that makes sense, haha).

Keep in mind that I live in Colorado which is at a higher altitude and thus, gets worse mpg. My driving is a mix. Monday through Friday I drive 9 miles back and forth work in traffic, at probably an average of 20mph. Most weekends I drive up to the mountains to snowboard (mountain highway driving).

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