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  #25  
Old 11-01-2010, 03:40 PM
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Re: 2011 Hemi MPG

My 5.7 L V-8 2011 Overland is getting 14.8 average (mixed city and highway) driving on 87 octane. I will be putting this into 89 octane at some point. But, I suspect, it will get .5 - 1 mile better.
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  #26  
Old 11-02-2010, 12:01 AM
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Re: 2011 Hemi MPG

Milage gets worse as cars get older, I just traded my 08 Limited with the V8 Hemi for an 2011 Overland with the V6. The first two years with the Hemi I would average 19-20 MPG on the Highway at 60-70MPH. This past year it struggled to get 17-18 highway. With the V6 I am getting around 23-25 mpg on the Highway now.
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  #27  
Old 11-02-2010, 07:05 AM
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Re: 2011 Hemi MPG

Mileage gets better and most engines are fully broken in by 40,000 miles. That should be the best time frame for your gas mileage. If it drops off sharply over the years the car has been neglected or your driving habits/conditions have changed.
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  #28  
Old 11-02-2010, 08:36 AM
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^^ correct


A drop in mileage can be due to a ton of things such as not changing fluids (diffs, trans, transfer case) causin increased drag. Bearing going on the wheels causing increased rolling resistance. Not changing spark plugs or air filters with oem or better replacements. Even different tire tread can affect this. Your issue of seeing decreased fuel economy vey well may be due to the decreased energy content per gallon of fuel due to ethanol. There is no truth to the idea that engines will have decreased fuel Economy under normal use unless it was neglected.
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  #29  
Old 11-02-2010, 11:32 AM
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Re: 2011 Hemi MPG

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Originally Posted by whatevrworks View Post
^^ correct


A drop in mileage can be due to a ton of things such as not changing fluids (diffs, trans, transfer case) causin increased drag. Bearing going on the wheels causing increased rolling resistance. Not changing spark plugs or air filters with oem or better replacements. Even different tire tread can affect this. Your issue of seeing decreased fuel economy vey well may be due to the decreased energy content per gallon of fuel due to ethanol. There is no truth to the idea that engines will have decreased fuel Economy under normal use unless it was neglected.
Not sure why I dropped MPG, My Limited only had 13,600 miles on it when traded, it was maintaned regularly did not have a scratch on it and was garage kept.
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  #30  
Old 11-02-2010, 01:32 PM
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Re: 2011 Hemi MPG

The biggest factor to mileage dropping is the change of fuel blends from "summer" to "winter" and also if a geographic region is dictated (by the government via EPA) to run highly oxygenated fuel. "Winter" blends and highly oxygenated fuel, while providing dubious benefit, very noticeably decreases fuel economy like when someone runs E85 instead of normal unleaded. Probably nothing wrong with the vehicle and simply a fuel blend change for the region, but disconcerting nonetheless.
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  #31  
Old 11-02-2010, 03:31 PM
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Re: 2011 Hemi MPG

Wait until 15% alky becomes the norm in the months to come, compliments of the EPA a week before election time. Then see what mileage becomes.
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  #32  
Old 11-02-2010, 03:54 PM
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Re: 2011 Hemi MPG

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Originally Posted by Lingohocken View Post
Wait until 15% alky becomes the norm in the months to come, compliments of the EPA a week before election time. Then see what mileage becomes.
I heard on the radio that going to 15% will take some time, because they have to make changes to the gas stations because of the damage 15% will cause. Makes you wonder how cars that aren't designed for it will do long term....
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  #33  
Old 11-02-2010, 04:51 PM
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Re: 2011 Hemi MPG

Not only cars, but small engines, ugh!
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