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  #37  
Old 01-24-2014, 03:12 PM
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Re: Miles per Gallon

Mine is a 4x4.
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  #38  
Old 01-24-2014, 05:10 PM
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Re: Miles per Gallon

4X4 here. Got close to 30 on summer blend, down around 20 with winter blend (includes idle time with warm ups) - also these sub zero temps are killing the milage. Below -10 it drops to around 18 mpg. Above 10 and I am getting low to mid 20's.
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  #39  
Old 01-24-2014, 05:22 PM
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Re: Miles per Gallon

From Denver, CO to Casa Grande, Az we got 29 mpg with less than 1,000 miles on the OD. Love this car Overland 4x4 diesel .
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  #40  
Old 01-24-2014, 07:12 PM
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Everyone's truck sounds great my durango RT is giving me 8.2 mpg in Chicago
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  #41  
Old 01-24-2014, 07:51 PM
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Re: Miles per Gallon

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Originally Posted by oshyto90 View Post
Everyone's truck sounds great my durango RT is giving me 8.2 mpg in Chicago
Really ? I get 17-19 mpg in Chicago with the 3.6L V6. I am glad someone else mentioned earlier that he got 32 mpg driving 60 mph on highway. I get 30 mpg at that same speed. Its obvious that the strength of the diesel engine, with respect to fuel economy, is in city driving. Not discussing here towing and off-road -related advantages.
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  #42  
Old 01-24-2014, 09:12 PM
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I filled up with my 2nd tank tonight. My evic stopped showing DTE at around 40 and it wouldn't remote start. Now my diesel only took 21.7 gallons and the DTE is now 475. I wasn't paying attention when I filled up after delivery so I can't hand calculate properly so this next tank will allow me to compare evic mpg to my own.
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  #43  
Old 01-24-2014, 09:34 PM
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I am averaging 20.5 MPG, but that is basically All city driving and sitting in nice bumper to bumper traffic. I took one highway trip And got 29 MPG. Even at 20 MPG it beats the hell out of the 12 MPG I used to get W/ My '12 RAM.
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  #44  
Old 01-24-2014, 10:33 PM
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Quote:
Originally Posted by f1anatic View Post
Really ? I get 17-19 mpg in Chicago with the 3.6L V6. I am glad someone else mentioned earlier that he got 32 mpg driving 60 mph on highway. I get 30 mpg at that same speed. Its obvious that the strength of the diesel engine, with respect to fuel economy, is in city driving. Not discussing here towing and off-road -related advantages.
Yea friend my am in a V8 I rarely step on it and the mpg is horrible :/ but it's ok I don't mind I fill her up every Saturday and never let it go empty so I always fill up with $60 to full or less lol
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  #45  
Old 01-25-2014, 12:46 AM
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I'm at 7400 miles since taking delivery in mid Nov. My ride is my business car so I clock a lot of miles on 2 and 4 lane highways at 60 to 78 mph. I just made a round trip of 500 miles across TN. I reset the trip meter and the EVIC held 31.5 mpg at 75 to 80 nonstop for 250 miles. The return trip was slightly lower due to a traffic jam in Nashville.

I run 38 psi measured cold and have the BlueSpark tuner installed. I buy diesel at Love's Truck stop or Walmart. Its been 3.55/gal recently.

I have "hyper-mile'd" on 2 occasions where the trip was almost all 2 lane 55mph and delta farmland flat for 80% of the 350 miles roundtrip. This route goes to a popular lake and the small town cops along the way are aggressive so I set the cruise at 55 and behave myself. I reset the EVIC before leaving and got 34.5 for the trip. This includes 50 miles of hilly terrain and a few trips to town at the lake. The temperature was in the mid 40's on both trips.

I checked my EVIC vs hand calculated on the first 4 or 5 tanks and it's over or under by fractions of a mpg as other have observed. I've had the tuner since the 3rd week of taking delivery.

So, what's the big trick for me? Here's my list:

Higher tire pressure helps reduce rolling friction
Long gentle accelerations
Limiting rpm to 2000 as much as possible
Coasting longer to stops
Timing intersections to avoid full stops when you can
Avoiding long idles

Things that I've observed that kill my mileage:

Cold weather! Diesels lose efficiency when operated cold and it takes 6 to 15 miles of operation for engine and transmission oil temps to reach 150*F or more when starting on a cold morning with a 2 minute warmup. Longer warmups are better for the motor but kill economy.

Hard acceleration/aggressive driving/high rpm operation has a huge affect. Diesels are most efficient at their lowest rpm on the peak of the torque curve while operating on as little turbo boost as possible. On our VM 3.0, that's 1500 to 1800 rpm. On flat ground, that's 50 to 60 mph and my boost gauge shows less than 2 psi. A steady 50 mph unloaded can yield a consistent instantaneous reading of 40 mpg!

BTW, with my tuner and driving hard, I can get down in the high teens too. You guys getting poor mileage probably have a lead foot. Although fun, your tires, brakes, economy, and motor life are all reduced. Whatever makes you happy...drive it like you stole it....its all good! No matter what you do, economy with the same driving behavior and performance in a gas burner will generally be 30% less....maybe worse with the hemi.

bd
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  #46  
Old 01-25-2014, 12:53 AM
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  #47  
Old 01-25-2014, 12:56 AM
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Quote:
Originally Posted by Colby View Post
When I first got my 14 JGC v6 back in June I was getting around 19 mpg and maybe two months ago the dealer had to replace a fuel something on my truck and now my truck goes back and forth from 12.9 - 14 mpg. What should I do?
Document the change in fuel usage and TAKE IT BACK! Seriously, that's a big change and costly to you.

bd
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  #48  
Old 01-25-2014, 12:58 AM
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Re: Miles per Gallon

Some years ago, I had read that diesels get the best fuel economy when run in their peak torque band. Anyone know if that's true? With the 3.0 I think that would mean from 1800 rpm into the low 2000s should be the best.
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