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  #13  
Old 07-22-2014, 10:05 AM
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Re: Eco Button Impact on Performance?

You really need to DRIVE any diesel for a few miles and you would find that the VM engine/ZF tranny combo IS buttery smooth. Was the JGC warmed up or cold? If it was cold, you really need to get it up to normal operating temperature and then evaluate it. We also considered the VW "Toerag" but it cost "more for less".

According to Jeep, the Eco Mode helps improve fuel economy by adjusting the transmission shift schedule, idle speed and interactive deceleration fuel shut off. We use ECO on all long road trips.

Note that Sport mode lowers the suspension (before it gets to 55mph), reworks the shift points and engine mapping. I prefer to use Sport mode around town !
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Old 07-22-2014, 10:14 AM
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Re: Eco Button Impact on Performance?

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Originally Posted by philbytx View Post
You really need to DRIVE any diesel for a few miles and you would find that the VM engine/ZF tranny combo IS buttery smooth. Was the JGC warmed up or cold? If it was cold, you really need to get it up to normal operating temperature and then evaluate it. We also considered the VW "Toerag" but it cost "more for less".

According to Jeep, the Eco Mode helps improve fuel economy by adjusting the transmission shift schedule, idle speed and interactive deceleration fuel shut off. We use ECO on all long road trips.

Note that Sport mode lowers the suspension (before it gets to 55mph), reworks the shift points and engine mapping. I prefer to use Sport mode around town !
It was pretty cold off the lot. I will call the dealer and try to get it again for a little longer drive to really go over it. I just wanted to get a feel for it yesterday.

Sport mode sounds like what I will have to put it in next go round.
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Old 07-22-2014, 11:52 AM
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Re: Eco Button Impact on Performance?

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Originally Posted by epicgc View Post
This is how I am feeling about a majority of the other vehicles in the market that come with the Diesel engines. They cost significantly more and come with less options than the JGC does (2 Speed Trans Case is a must for me). My father has had the V6 Gasser JGC for over 2 years with no troubles. I have had 2 JKU's with no troubles. Plus I drive 30K miles a year.

With driving 30K miles a year, I too don't worry about 0-60 but I do care about power to get on the highway, lane changing and passing abilities. That's where I felt the JGC was weaker than the Touareg. You all are making me think I just need to go back and turn the ECO mode off and try it again.
I've had no issues with it power wise. I won't beat out a Mustang 0-60 but I've had no issues passing even when towing a 6k lb enclosed trailer - just pulls like a beast. I turn off ECO mode and put it in sport and do my own shifting so I am on full power when I want it (like in going up hills so the tranny doesn't have to do a gear hunt).

If you do a payback calculation - please not base off EPA #s as they are lab or algorithms and not real world. WSJ recently did an article on EPA needs to do real world and not it's current method and they found that diesel models performed much better than EPA (sometimes by up to 5 mpg better) versus gas / hybrid models performed worse than EPA on average (sometimes by up to 8 mpg!). In order adjust EPA add a couple mpg to the diesel #s and reduce the gas #s by the same. That will be more indicative. Remember diesels make their max torque at much lower RPM and diesel fuel has 25% greater energy density than gas per equal volume. Another great thing is don't have to stop for fuel as often.
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  #16  
Old 07-22-2014, 11:59 AM
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Re: Eco Button Impact on Performance?

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I've had no issues with it power wise. I won't beat out a Mustang 0-60 but I've had no issues passing even when towing a 6k lb enclosed trailer - just pulls like a beast. I turn off ECO mode and put it in sport and do my own shifting so I am on full power when I want it (like in going up hills so the tranny doesn't have to do a gear hunt).

If you do a payback calculation - please not the EPA #s on the diesel is actually lower than what most of us get (by about 2-3 mpg) and on the flip side the gas models get 2-3 mpg lower than EPA so the mpg savings is much bigger than the arbitrary numbers on the EPA sticker show. The diesel will pay for itself much quicker than you'd expect. Plus the time you save not having to gas up as often helps trip planning and less inconvenience (though you have much longer oil changes and have to add DEF).
Good to know about the power. Seems to be the general consensus. I will try it in the different mode.

Based on my numbers even being conservative with the diesel EPA # and inline with the V8 expectations it would take quite a price difference per gallong and quite a bit of Oil changes and DEF re-fills to outweigh the savings at the pump. Plus we regularly take a 420 mile drive and I would really enjoy it if I could get there on one tank and have some left to drive around a little before filling up to come back. This is my primary goal.
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Old 07-22-2014, 12:45 PM
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Eco Button Impact on Performance?

I worked with a friend of mine - also a member on here - and compiled a spreadsheet 8 weeks ago - using just EPA numbers, real world fuel prices based upon prices here in the upper Midwest, and using DEF of $5/gallon, dealer oil change costs. The EcoDiesel v/s the V8 will pay for itself within 14 months, and the EcoDiesel v/s the V6 will pay for itself in 36 months, all based purely on fuel economy.

None of the data was manipulated in anyway, so please spare the rhetoric of how a spreadsheet can be skewed/manipulated in order to achieve the desired results. And, with his permission, I would be happy to share the spreadsheet with anyone. We did the same on the other forum, but there was so much anti-diesel hate, and so many anti-diesel trolls that the thread was removed.


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Old 07-22-2014, 12:49 PM
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Re: Eco Button Impact on Performance?

If you regularly do 420 mile drives, you will find that the JGC Diesel is really great on road trips. Read the last of my trip reports.....getting 25mpg going 420 miles with the cruise set at 80mph is pretty darn good for a 5500lb 4x4 !
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Old 07-22-2014, 12:50 PM
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Re: Eco Button Impact on Performance?

Keep in mind, there are three modes. ECO on,ECO off and Sport.
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Old 07-22-2014, 01:50 PM
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Re: Eco Button Impact on Performance?

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Originally Posted by philbytx View Post
If you regularly do 420 mile drives, you will find that the JGC Diesel is really great on road trips. Read the last of my trip reports.....getting 25mpg going 420 miles with the cruise set at 80mph is pretty darn good for a 5500lb 4x4 !
I was hoping for a little better at 80 than 25 but it will put my LR4 to shame when it is getting 18-19 on the same route. I know my father can get 26 out of his V6 Penta when doing 70 on the same trip. Really hoping 25 is a low point.
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Old 07-22-2014, 01:55 PM
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Re: Eco Button Impact on Performance?

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Originally Posted by epicgc View Post
I was hoping for a little better at 80 than 25 but it will put my LR4 to shame when it is getting 18-19 on the same route. I know my father can get 26 out of his V6 Penta when doing 70 on the same trip. Really hoping 25 is a low point.
What? 25mpg @ 80 is awesome. My wifes little GLK 350 with the 3.5L gasser is lucky to get 20MPG when we have it pushing 80mph - Still wish she woulda waited for the BlueTech.
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Old 07-22-2014, 02:02 PM
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Re: Eco Button Impact on Performance?

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What? 25mpg @ 80 is awesome. My wifes little GLK 350 with the 3.5L gasser is lucky to get 20MPG when we have it pushing 80mph - Still wish she woulda waited for the BlueTech.
I guess what I should ask is if the 25 was on the trip computer or not?

My LR4 will show 19 on the computer but I am sure it is more like 17-18 if you hand calculated it. So I am sure the JGC Diesel will beat it by quite a bit.

Another benefit the JGC has going for it is a larger fuel tank than the LR4. So that will help as well with the distance capability.
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Old 07-22-2014, 02:19 PM
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Re: Eco Button Impact on Performance?

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Originally Posted by Jason911 View Post
I worked with a friend of mine - also a member on here - and compiled a spreadsheet 8 weeks ago - using just EPA numbers, real world fuel prices based upon prices here in the upper Midwest, and using DEF of $5/gallon, dealer oil change costs. The EcoDiesel v/s the V8 will pay for itself within 14 months, and the EcoDiesel v/s the V6 will pay for itself in 36 months, all based purely on fuel economy.
Breakeven will be even less in reality as EPA #s are not real world. Checking Fuelly.com and Fueleconomy.gov (for 2014 WK2) for average user report mpg results the v8 gets an average of 18-19 mpg, the v6 21-22 mpg and the diesel 25-26 mpg. You have to throw out the highs/lows but you get an idea that most users don't get EPA.

But it's besides the point as those who know how to see ahead can slow down early and coast to a stop or not stop at all (as you timed a stop light or traffic). Unfortunately most drivers never see ahead of the person they are following and then always have to be on / off the throttle & brakes.

Using this method I've seen my WK2 ecodiesel get 27 instant mpg on the EVIC in heavy traffic on I287 in NJ near S. Brunswick in rush hour (just going 15 mph and leaving a long gap (don't care about the cutters) and just idle along. Going 60 mph and slowing / coasting where I'm able I've seen 34 mpg and it included several 2 lane passes as well.
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Old 07-22-2014, 02:21 PM
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Re: Eco Button Impact on Performance?

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But it's besides the point as those who know how to see ahead can slow down early and coast to a stop or not stop at all (as you timed a stop light or traffic).
This is my driving style and is probably why I get above average in my LR4.
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