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  #13  
Old 09-01-2014, 05:28 PM
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Re: Eco Diesel Mileage

'14 limited 4x4 6556 miles(purchased new 01 July 2014), routinely plunking 28+ city. Last long trip I did was on my way back from the cabin: Superior-Duluth-back to superior-Ashland-Wausau-Madison-Milwaukee and back to madison(over the course of 2 days). Tank wasn't empty when I filled up with #2 diesel, but both the EVIC and hand calculations were almost identical @ 31.9.


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  #14  
Old 09-02-2014, 07:39 AM
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Re: Eco Diesel Mileage

I averaged about 32mpg on a recent trip to/from DC to Vermont. I get about 20 on my daily commute.
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  #15  
Old 09-02-2014, 08:03 AM
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Re: Eco Diesel Mileage

Got the average for the tank up to 39 MPG this last weekend.

Filled up in Dublin, OH near the freeway.
Dublin, OH to Ann Arbor, MI. ACC set at 57 mph unless the limit was under 55.

The drive back to Columbus we saw the tank come down to 35 as we took a different route and side-tracked a little to find a place to eat.

Still, this is fantastic. 57 is the speed we generally drive. This was all in the 9000 mile range.

Edit: Typo
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  #16  
Old 09-02-2014, 07:10 PM
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Re: Eco Diesel Mileage

'14 Overland build date 28 Sept 13 now with 17800 miles
Travelled phx to Laughlin and got 29.2 over there and 30.1 back. Speed limit to 5 to 7 over and did not push it never getting go pedal to floor.
City average is 24.8. We try to run constant min B5 fuel. Very happy with this but yes we bought it for the torque and to be able to tow.
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Old 09-02-2014, 07:39 PM
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Re: Eco Diesel Mileage

14, aero.. recent running on I-70 mo-ut, ut-nyc, back to mo... running +5, overall average 27.9 mpg, 7500 miles on the gc.. avg are:
75+=~25-27
65-74=~28-30
<65=~32+
First Exhaust Regent @6800, after a week of east coast stop and go
3 "service electronic throttle control" cell's, car still running

YMMV...
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  #18  
Old 09-04-2014, 01:30 AM
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Re: Eco Diesel Mileage

Long drive - Texas to Minnesota I got 30 mpg. Around town I get around 25, and 30 on longer trips. Towing I get around 18
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  #19  
Old 09-04-2014, 04:43 AM
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Re: Eco Diesel Mileage

Average overall 29.4 for 13,000 Miles, worst was 24 mpg and best was 32 mpg
one oil change and 17% to go for 2nd one, no towing, 50-50 city and freeway, click on image for more details
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  #20  
Old 09-04-2014, 06:30 AM
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Re: Eco Diesel Mileage

4x4 Limited, no towing yet.

I get roughly 26 @ 75, 28 @ 70, 31 @ 65 and 20 in stop and go city driving.

My work commute is 80% freeway @ 65. My lifetime average over 6500 miles is 28mpg which I think is pretty good for a mid size SUV.
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  #21  
Old 09-04-2014, 01:16 PM
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Re: Eco Diesel Mileage

I live in the city, and while I commute 10+ miles each way per day, I can't seem to get average tanks above 27mpg. You can click on my Fuelly badge below for more details. I see those of you who get 30+ and am envious.

I just started calculating my city/highway splits by taking my elapsed trip time and dividing that into the miles driven. It turns out that I am driving more like 60/40 city/hwy whereas before I estimated that I was doing the opposite.

Even my long trips don't get higher mileage because I usually try to do some offroading at some point, and that eats up my fuel.

Compared to my 2012 Hemi, I'm getting 10 mpg more in the diesel. Here in So Cal, #2 diesel is the same price as 87 octane, so even with the higher price of the diesel engine I am still on track to have a lower TCO with a diesel overland than with the Hemi limited.
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  #22  
Old 09-05-2014, 09:24 AM
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Re: Eco Diesel Mileage

The mileage has been underwhelming for me as well. I have 21,000 miles on my sulfur unicorn. I average around 25 mpg. A lot of highway driving. I bought it because I put about 20-25k miles a year on any car I drive and I want to keep this one for 10-15 years so I can buy a few fun cars every 5 years and just have this one as my daily driver. When warranty is up going to get a wrangler for the beach.

Long story short gas mileage is not the most important reason to buy a diesel. The engine will last you about twice as long if not longer then a gas (probably more like somewhere between 2x and 3x).

Not sure if it will matter for resale either, but I imagine once they get over 100k miles that will be a factor for people as a diesel is just breaking in where a gas engine is starting to show a few greys.
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  #23  
Old 09-05-2014, 10:43 AM
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Re: Eco Diesel Mileage

My average over the last 7 months has been about 23.4 mpg (manual calculation), I also noticed no mpg change between winter and summer blends, not sure if they use a winter blend or not here in NE OK. I probably drive 80% highway/20% city and mostly commute to/from work, I was expecting my MPG to be a little better but I guess I can't complain. Another thing is my manual mpg calculation always comes out at least 1 MPG better than what the EVIC shows. Here's a screenshot from my app: ImageUploadedByJeepGarage1409931737.606267.jpg




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  #24  
Old 09-05-2014, 11:25 AM
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Re: Eco Diesel Mileage

Quote:
Originally Posted by aboyce85 View Post
My average over the last 7 months has been about 23.4 mpg (manual calculation)
Based on your data, your mpg seems about right. Your fill interval is ~14 days average and your averaging 23.4 on a 20 gallon fillup. Thats about 470 miles every 14 days. Your driving 33 miles a day. The drivetrain won't reach peak efficiency until it warms up...which takes 10 miles or more depending on ambient temperature. Best case, you are driving 17 miles each way. Only 7 miles are after warmup. If you have more drive cycles than work and back, efficiency goes down due to the shorter trips.

I'm a field engineer and ususlly drive 80% highway and most drive cycles are > 30 continous miles. My overall per tank mpg usually calculates to 26.5 but has been as high as 30 on longer interstate trips at 70mph.

During the holidays I was off work a few weeks and observed similar results to yours as I only drive shorter runs. Thats my theory and follows what I have seen with mine.
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