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  #37  
Old 06-05-2014, 02:37 PM
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Re: First Long Trip MPG Results

Picked up my Jeep just before Memorial Day weekend through the DC group buy. I went from DC to SC to visit family and back home to CT on the following Tues. When I pulled into my driveway, the computer read 1264 miles and 31.4 MPG. I was astounded. Now, that's mostly on I-95 and about 70-75 aside from fairly horrible traffic in VA-DC-MD-DE (amazingly NJ and NY was clear). Hoping to see great towing mileage for winter excursions to upstate NY and VT.

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  #38  
Old 06-05-2014, 02:43 PM
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Re: First Long Trip MPG Results

Keep in mind that the EVIC uses a rolling 300 mile average...so whatever you read is from the last 300 miles or reset, whichever came first.

This method used on our Jeeps explains why hand calcs may differ since a tank is 600+ miles.
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  #39  
Old 06-06-2014, 12:17 AM
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Re: First Long Trip MPG Results

I like this thread, can't wait to see what mine get, unfortunately/ fortunately we like in Lake Tahoe will lots of hills, I only have 300 miles on it and I am only seeing 21.6 around town. On the highway I was seeing 25.5 and that's coming up 1,200 or so feet over 7,200 at the pass. We are doing a long 8 week road trip in the fall. We bought it to tow so I wanted to get it early and make sure it was all broken in and the bugs worked out before we set out for the road trip. We will be buying a 20 ft travel trailer. The Audi Q5 wasn't going to cut it. Hopefully we can get all the little issues sorted soon. Overall it's great.
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  #40  
Old 06-08-2014, 03:54 PM
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Re: First Long Trip MPG Results

Just back from a 350 mile road trip from NJ to CT.

29.7 mpg with flat sections, hills on the Merritt Parkway, and small amount of stop and go.

Utilized the paddle shift and Sport mode through most of the hilly sections.

Tried the automated cruise control - stopped the car completely when it was appropriate.

Found that the mileage suffers on cruise control.

Couldn't be happier with the performance.

Of course, gas pump attendant in NJ had to tell me that I was at the wrong pump.


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  #41  
Old 06-08-2014, 07:27 PM
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Re: First Long Trip MPG Results

Just drove from KS to NJ this weekend towing my enclosed trailer loaded up with racecar, tool chest and 25 gallon air compressor with another 2500 lbs of gear inside (loaded to ceiling). The Jeep was also loaded up with no room to sit in the back.

First leg from KS to OH, I ran 62-65 mph and was not that happy with mileage on the trip to STL. After that I switched off ECO and then stopped using cruise control (as it changes too late to a gear to crawl up the hill often requiring it to go to 2 gears when one downshift is needed - my foot took care of that). Mileage went up from low 14's to low 15's.

The second leg the Jeep had no issues so I decided to push it a little harder and ran 65+ mph often at 70-72 mph. This included going through the mountains in WV and PA and mileage was low 16's as I found out that if you run 70+ MPH the RPMs sit at 1,800 RPM and higher and often didn't need to downshift to make it up most small inclines and only 1 gear down to make it up several others - however there were hills it needed to go down to 6th gear.

So towing advice - shut off ECO as you want to hold gears more. Don't use cruise control if hilly (or give it some gas so it does downshift before the hill and speed doesn't drop) as it reacts too late and often has to downshift another gear it didn't need.

Stopped at a rest stop on the way and a guy in an ecoboost F150 I passed earlier pulled up to the gas pump next to me. He noted my "diesel inside" sticker and asked what my mpg was just going the same route and he noted that his mpg was 18 mpg going about the same speed and he wasn't towing/hauling at all.
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  #42  
Old 06-09-2014, 06:39 AM
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Re: First Long Trip MPG Results

Great write up of your trip experience.

Agreed regarding cruise control and ECO. These are not the preferred way to efficiently manage dynamic terrain and load.

I have found that keeping the revs above 2k is the most efficient for moving up hills and keeping momentum. Letting the computer decide doesn't work.

I have traveled my exact routes w both my '11 Hemi and now the diesel. I also didn't change my driving style to fudge the results.

The diesel basically gets 8-9 MPG's better in all driving situations - hills, highway, city, towing. But you have to use the paddle shift, sport when appropriate. If you lug then the mileage goes down.


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  #43  
Old 06-11-2014, 03:03 PM
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Re: First Long Trip MPG Results

Got mine in early January and with winter fuel during the bitter cold I have been averaging 26-27 with mostly highway but maybe 10 or 20% off highway. When march came around it moved up around 28. I believe that we finally got summer fuel because my average per tank has been in the 29's for the last two tanks. It is all based on miles since last fill up and actual gallons in the tank. All charted in a spreadsheet. My last tank was 29.35 and the trip average said I was above 30 MPG but for the last few tanks when the weather was warm the readings on the EVIC were always higher by a good mile per gallon. In the colder months it was actually pretty close with a difference of only.2 or .3 from the calculated amount.

I drive the hills of NE PA and upstate NY so there are few flat spots to be found. I do take advantage of the down hills and just let the truck roll even if I do lose some speed. I probably average around 65 MPH but some days if I am late for work I will cruise 70-75.

I am sure I will get a week where I get in the 30's when I do less city driving which really drives the average down pretty quickly. I know if I went on a trip where it was pretty much all highway driving I would be much higher than 30.

While I do so much driving per week and tend to lean toward driving for the best fuel economy, It really is nice to have all that torque when you want to pick up the pace. This truck cruises at 70 or 80 just as easily as it does at 60 and even when you have to air it out and get in the you are going to jail if they catch you speeds I never had the courage to really get to the point where it was straining and I was above 3 digits at the time.
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  #44  
Old 06-11-2014, 08:28 PM
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Re: First Long Trip MPG Results

So have you guys found better fast highway driving MPG with Eco on or off? Does it even matter once you settle down in 8th gear?
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  #45  
Old 06-11-2014, 09:00 PM
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Re: First Long Trip MPG Results

I don't think ECO changes fuel delivery, just shift points. I could be wrong but honestly I don't turn mine off except automatically in Sport mode.
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  #46  
Old 06-12-2014, 01:17 AM
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Re: First Long Trip MPG Results

Quote:
Originally Posted by ExcursionDiesel View Post
I don't think ECO changes fuel delivery, just shift points. I could be wrong but honestly I don't turn mine off except automatically in Sport mode.
Could be very true. So at steady highway speeds (baring mountains), both would be in 8th gear and economy identical.
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