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Non VW Group Diesels This section is for discusion of Non VWGroup Diesels.

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Old February 7th, 2019, 13:29   #61
woofie2
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Originally Posted by turbobrick240 View Post
The Cummins lie-o-meters are notorious for being 4-5 mpg optimistic. It takes hand calculating many tankfuls to get any kind of accuracy. I could tag 55 mpg on the mfd in my Golf, but in real world use it averaged more like 42 mpg.
I remember tracking my 2003 Jetta in a spreadsheet, hitting 55 and 54 MPG in back to back tanks (with lows in the 30's, while I was racing)

I noticed the rams do not have a "fuel amount used" to you can see how far off they are at fillup.
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Old February 7th, 2019, 15:42   #62
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Here's some real data acquired from hundreds of users over millions of miles in regards to the 6.7 Cummins FE.

http://www.fuelly.com/car/ram/2500/2...=&submodel_id=

The 5.9 does a little worse:

http://www.fuelly.com/car/dodge/ram_...=&submodel_id=

Last edited by turbobrick240; February 7th, 2019 at 15:55.
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Old February 7th, 2019, 16:21   #63
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Originally Posted by turbobrick240 View Post
The Cummins lie-o-meters are notorious for being 4-5 mpg optimistic. It takes hand calculating many tankfuls to get any kind of accuracy. I could tag 55 mpg on the mfd in my Golf, but in real world use it averaged more like 42 mpg.

Amen!


Get me about at least 50,000 miles of hand calculated tankfuls and let the truth start emerging ...
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Old February 8th, 2019, 03:27   #64
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Yeah I don't think anyone *should* be purchasing a big heavy duty pickup for fuel economy. The Cummins' best attribute is its power and durability. However, it still likely equals are betters the gasoline V8s in the half ton trucks, and it likely doesn't make a substantial hit if you are towing or hauling a heavy load. And that is with lower gearing (since 3/4+ ton trucks always have that) and a heavier curb weight, largely due to the engine weight alone.

I know my current and previous trucks consume about the same amount of fuel, 1996 F150 4.9L regular cab 5sp vs. my 1990 F350 HD 7.3L turbodiesel Supercab automatic. And the F350 didn't care if there was something hooked behind it. Like, at all. In fact it actually ran better I think with a car or trailer hooked behind it. Of course, this was old school diesel, no catalysts, no EGR, no DPF, no nothing.
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Old February 8th, 2019, 07:13   #65
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"Yea, I get like 200 miles to half a tank, it does pretty good."
used to do that all the time in my dad's early 80s F350. I can't remember the tank size but that thing would always run about 200 miles on the first half of the tank. If you were lucky, you got about 50 out of the second half though.
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Old February 8th, 2019, 07:19   #66
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Originally Posted by woofie2 View Post
brother in law just got a 2108 3500 crew cab, single rear axle, manual base tradesman(vinyl floors) 4x4, it shows 20MPG at 70 MPH on the highway.
I am averaging 21 MPG daily over the two weeks I have been in my 1500 Laramie ecodiesel and got 23MPG doing 80 on the interstate. (this pinball weather sucks the mpg down about a half mpg per day daily driving) below 30*F.
At almost 17k miles, my lifetime average in my 1500 ecodiesel is just a touch over 22 mpg. Best tank ever was coming down out of the Blue Ridge at 27 mpg.
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Old February 12th, 2019, 18:42   #67
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Quote:
Originally Posted by turbobrick240 View Post
Here's some real data acquired from hundreds of users over millions of miles in regards to the 6.7 Cummins FE.

http://www.fuelly.com/car/ram/2500/2...=&submodel_id=

The 5.9 does a little worse:

http://www.fuelly.com/car/dodge/ram_...=&submodel_id=
Looks about right.
2500 6.7
http://www.fuelly.com/car/ram/2500?e...=&submodel_id=

RAM 1500 5.7 hemi
http://www.fuelly.com/car/ram/1500?e...=&submodel_id=

The new 5.7 hybrids
http://www.fuelly.com/car/ram/1500?e...=&submodel_id=

1500 eco’s
http://www.fuelly.com/car/ram/1500?e...=&submodel_id=
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Old June 10th, 2019, 12:24   #68
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FCA "RAM" dropped their specifications on their 2020 Ecodiesel
as expected they held out to stay on top:
https://www.tfltruck.com/2019/06/202...el-video-news/
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Old June 11th, 2019, 20:48   #69
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FCA "RAM" dropped their specifications on their 2020 Ecodiesel
as expected they held out to stay on top:
https://www.tfltruck.com/2019/06/202...el-video-news/
GM I6 has greater HP, FCA V6 has greater torque. I've always liked the I6 configuration over V6.
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Old June 12th, 2019, 03:28   #70
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I agree that an inline 6 has some advantages over a V6. Better balance is the main one, but generally a simpler easier servicing is another. V6s became popular due to packaging, that is pretty much it.

V6 engines if set at 90 degrees almost always require a balance shaft to offset the uneven vibrations. The VAG 3.0L V6 and the MB 3.0L V6 diesels both have them, not sure about the VM 3.0L V6. But for sure the GM 3.0L I6 does not.

MB did a TREMENDOUS amount of R&D before making the switch, but BMW has held on to the inlines. Volkswagen's VR6 engines combine the advantages of an inline with better packaging of the V. Too bad they chose to run the camshafts with chains, otherwise that engine family would be pretty darn good.

Only downside I can see with I6s is that they often have exhaust manifold warping/cracking problems, especially if they do not employ some form of split manifold arrangement.
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Old June 12th, 2019, 16:26   #71
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MB did a TREMENDOUS amount of R&D before making the switch, but BMW has held on to the inlines.
About two years ago, Mercedes introduced their new line of I-6 engines, both gas and diesel. The diesel comes in two power/torque variants, with the more powerful unit generating very impressive 340 PS and 750 N.m (552 lb.ft) out of a 2.9-liter displacement. That engine has some very novel features, such as all-steel pistons and only 4 mm wall between adjacent cylinders. I am convinced we will never see that engine (its diesel variant) on this side of the pond.
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Old June 13th, 2019, 06:05   #72
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Hasn't Daimler already killed all the diesels in North America except the Sprinter van?
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Old June 13th, 2019, 06:14   #73
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Sadly yes. That inline 6 would be lovely in an E Class (I'm not a truck guy). I love the six in my 335d: I think that the only engine that's supposed to be smoother than an inline 6 is a V12. Maybe that's why I have this unreasonable desire to own an S-Class with one of those.
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Old June 13th, 2019, 06:35   #74
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The new Sprinter is the only diesel, but sadly, the 4 cyl did not return with it, just the V6. Which is certainly not a bad engine, but I think the 4 cyl option is great. I love mine.
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Old June 13th, 2019, 06:49   #75
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Not to go too far off track, but we recently learned that Mercedes didn't include a 4 cylinder engine in the current Sprinter because, in the 2500 and 3500 trucks, when heavily loaded, water pumps were failing. The water pump is variable, controlled by vacuum, and when it fails it pumps coolant throughout the vacuum system. If the CEL is ignored, it can get as far as the brake booster and turbo actuator. We just made a repair kit for it: https://www.idparts.com/om651-vacuum...1-p-12239.html

The OM651 seems to work fine in the 1500, but in RVs on the higher GVW platforms it's been a problem.
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