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  #25  
Old 02-24-2011, 03:03 PM
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Re: V6 gas mileage

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Originally Posted by SixZeroFour View Post
I'm fairly confident that most of the people posting numbers of 14+ MPG on the V8 are either driving like a grannys purely for the purpose of higher mileage or they are taking a sample from a short drive and not an average across a full tank.

Even when driving aggresivly I think the lowest my Jeep has read was about 14.5mpg and that was with no regard at all to mileage. If you were driving the same way with the hemi you will most likely be under 10mpg. That's almost 50% more mileage and is a huge difference in fuel cost especially if you are like me and need to fill up at least once a week. I would say I have a "normal" driving style and can easily hit 17+ combined hwy and city.

In the end it's tough to compare mpg numbers from different people as the way you drive almost plays as much of a role as the engine size.

Edit: as dckcentuar mentioned above the milage most definitly improved after the first 4 or so fill-ups
^^ This is all wrong....I drive just as aggressive as the next guy. Always do close to 10 over the speed limit and frequently pass people with the accelerator to the floor. I've never gotten worse than 14mpg on my V8 hemi and last weekend on a 300 mile trip got almost 22mpg. That's just true numbers there folks, no smoke up anybody's skirt.
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  #26  
Old 02-24-2011, 03:53 PM
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Re: V6 gas mileage

It's not all wrong.

The speed you are going over the posted limit doesn't have anything to do with it, its how heavy your foot is on the gas when accellerating away from stoplights, or as you mentioned passing etc.

I don't doubt that you can pull the 22mpg hwy because the V8 is shutting down two cylinders and running in eco mode...

Take a look at this post:
Hemi Gas Mileage?

The majority of owners are registering between 11 and 14 mpg with the hemi.

The winter blend/summer blend difference is also probably padding your numbers by 2-3mpg. Since you are down south I would assume you get the summer blend year round unlike the rest of us living in colder climates. If this is the case it would bring your numbers right inline with the average shown in the other thread.
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  #27  
Old 02-24-2011, 04:21 PM
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Re: V6 gas mileage

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Originally Posted by SixZeroFour View Post
The winter blend/summer blend difference is also probably padding your numbers by 2-3mpg.
Whats the difference in summer and winter blend with gas? I only know there is some with Diesel when the temperature goes below 20 degree celsius.
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  #28  
Old 02-24-2011, 04:30 PM
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Re: V6 gas mileage

Here are a few quick links from google:

http://ask.cars.com/2009/02/whats-th...y-cars-pe.html

http://auto.howstuffworks.com/fuel-e...mmer-fuel1.htm

http://www.slate.com/id/2098672/

2-3mpg is the difference in I have seen mentioned a few times now but I can't say for certian just how accurate that is.
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Old 02-24-2011, 05:04 PM
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Re: V6 gas mileage

Getting about 16-17 MPG around town in my 4x4, only 200 miles on the odo.

Just drove for about 40 miles on the highway at about 65 mph. Using active cruise shortest following distance behind other big SUVs I averaged 28 mpg on the EVIC. I'm hoping once this thing is broken in this summer I can get 30 mpg on the way to the beach!
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  #30  
Old 02-24-2011, 05:42 PM
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Re: V6 gas mileage

Quote:
Originally Posted by SixZeroFour View Post
It's not all wrong.

The speed you are going over the posted limit doesn't have anything to do with it, its how heavy your foot is on the gas when accellerating away from stoplights, or as you mentioned passing etc.

I don't doubt that you can pull the 22mpg hwy because the V8 is shutting down two cylinders and running in eco mode...

Take a look at this post:
Hemi Gas Mileage?

The majority of owners are registering between 11 and 14 mpg with the hemi.

The winter blend/summer blend difference is also probably padding your numbers by 2-3mpg. Since you are down south I would assume you get the summer blend year round unlike the rest of us living in colder climates. If this is the case it would bring your numbers right inline with the average shown in the other thread.
The point I was making was I don't drive like a "granny" as you mention we must do to be able to get that type of gas milage. The speed you are driving as a huge bearing on your mpg:


- 3% less efficient at 60 mph
- 8% less efficient at 65 mph
- 17% less efficient at 70 mph
- 23% less efficient at 75 mph
- 28% less efficient at 80 mph

So by saying I drive an average of 10mph over I'm saying I'm not helping myself out by doing so. I agree with you summer/winter blends, and sure it does affect my mpg in a good way.

From my experience I'm seeing the V6 get 2 maybe 3 mpg better than my V8, which IMO isn't worth the loss in power/performance/towing.
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  #31  
Old 02-24-2011, 08:42 PM
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Re: V6 gas mileage

Quote:
Originally Posted by jonesark View Post
The speed you are driving as a huge bearing on your mpg:
We were talking about city or combined milage not when at speeds of 60+ mph - I would consider that hwy mileage. At or below 45mph the efficiency loss would be less than 1% based on your numbers below.

Honestly, if you are able to drive agressivly and have never gone below 14mpg (meaning you average 15, maybe 16+ driving in the same manner??) with the V8, either the calculation is off or you have a one-off factory freak. If this is the case then congrats on finding a gem
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  #32  
Old 02-24-2011, 09:20 PM
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Re: V6 gas mileage

I'm getting between 18 and 19 real mpg in mixed daily driving... the evic is usually about a half mpg too high
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  #33  
Old 02-24-2011, 10:06 PM
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Re: V6 gas mileage

Quote:
Originally Posted by SixZeroFour View Post
It's not all wrong.

The speed you are going over the posted limit doesn't have anything to do with it, its how heavy your foot is on the gas when accellerating away from stoplights, or as you mentioned passing etc.

I don't doubt that you can pull the 22mpg hwy because the V8 is shutting down two cylinders and running in eco mode...

Take a look at this post:
Hemi Gas Mileage?

The majority of owners are registering between 11 and 14 mpg with the hemi.

The winter blend/summer blend difference is also probably padding your numbers by 2-3mpg. Since you are down south I would assume you get the summer blend year round unlike the rest of us living in colder climates. If this is the case it would bring your numbers right inline with the average shown in the other thread.
we get the winter stuff for about 4 months. it usually shows up first in the diesel. we have started changing back over to summer blind the past few weeks. the dodge 2500 is back to 18+ city

as a side note i filled up Tuesday with gas from a station that must still have winter blind because mpg has dropped to 14. which is a little lower than the normal numbers i have been seeing.
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  #34  
Old 02-25-2011, 02:02 AM
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Re: V6 gas mileage

i'm mostly city driving with a short freeway commute. about 17 mpg for the 1,000 miles i've clocked.
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Old 03-02-2011, 03:41 PM
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Re: V6 gas mileage

I was getting 18 off the dealer lot
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  #36  
Old 05-15-2011, 12:56 PM
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Re: V6 gas mileage

My previous Chrysler Aspen SUV with the V8 Hemi MDS (computer shutdown of 4 of 8 cylinders at constant cruising speed) reported between 9 and 10 Liters per 100 KM (26 to 23.5 MPG) on long stretches of level road fully loaded on a trip that I make every summer from my home in Calgary Canada to Traverse City Michigan. Theses readings from the trip computer began after about a six month break-in. On most trips I used 87 Octane. One thing that I did notice was a drop in efficiency in areas where stations carried a mixture of gasoline and ethanol. I am not talking about E85 Flex Fuel (This issue is discussed in depth in other treads on this site). One thing that I should mention is that all my vehicles use Mobil 1 (100% Synthetic). Around town my Aspen used 15 to 17 Liters per 100 KM. I can only hope that my 2011 Grand Cherokee Overland 3.6 V6 can match the 9 and 10 Liters per 100 KM on the open road this summer. This winter my fuel efficiency has been promising around town and on short trips on the open road. I will report back on my trip to Michigan this summer.
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