Picking up a new 2021 Ram 2500 Cummins this weekend. Coming from Fords for the past 4 years I always ran fuel additives. Main thing noticed was that truck used less DEF and smelled less during regen. I mostly ran the Motorcraft stuff. With the new pumps in the 2021's what is now recommended? Mopar stuff? Any comment welcome.
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Another additive thread
- Thread starter fourbybud
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I'd like to see the science behind a fuel additive using less DEF? Not sure how that is even possible, at least at any measurable difference.
Additives are going to be a personal choice. None are required and they run fine without them but some people still use them (because grandpa always did back in the day etc). I've tried a couple here and there just to see what the hubbub was all about but can't say I noticed anything different about the truck so not something I use on a regular basis.
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Additives are going to be a personal choice. None are required and they run fine without them but some people still use them (because grandpa always did back in the day etc). I've tried a couple here and there just to see what the hubbub was all about but can't say I noticed anything different about the truck so not something I use on a regular basis.
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naplesbill
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There is only one additive manufacturer endorsed by Cummins:
www.trucker.com
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For the Driver from American Trucker serves independent owner-operators and growing trucking fleets operating fewer than five power units.
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Sponge60
Well-Known Member
I wonder about that too. Had a Ford and they wanted you to use their fuel additive and their DEF. Had a Chevy and pretty much the same thing. Seems that Cummins says no additive is necessary, but they also endorse only Diesel Kleen. If lubricity and cetane boost helps, then why not?
More a CP4 discussion but the info on anything you might use is here.
hdrams.com
CP4 Changes - additives discussion
I have seen better results with xdp over edt. That would be the old style pump. Below is the new style. With the single dimple marking and other dimples below. The designation is the single larger dimple in the circled location. That is the only way to tell is if that single dimple is there the...
hdrams.com
I'm new to the diesel world and still waiting for mine to show up so I have no real experience with any of the additives and such but I'm wondering if the higher cetane allows for a more complete, cleaner, burn and has less soot for the particulate filter to burn off thus leading to less DEF fluid being needed to complete the burn off process? This is just a total stab in the dark and more of a WAG
DEF has nothing to do with the DPF filter or soot burn off. It is used in the SCR (after the DPF) to reduce NOx emissions.
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Yes they do not "recommend" or need anything however a couple years ago they entered into some sort of business arrangement ($$) with diesel kleen and now "endorse" that product.
Obviously it won't hurt anything to run if you choose to do so.
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freeram
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I added Diesel Clean to my 17 and 19 3500 and both times I got the "Change diesel particulate filters" message, or something close to that. both trucks were around 10k miles when I did this. It must've knocked some crud loose?
Glad I prefaced my post with saying that I have no diesel experience, lol. I need to learn how the whole DEF, DPF, SCR and any other acronym works on these trucks
H3LZSN1P3R
You're doing it wrong
Power service diesel kleen is the only product ever to be endorced by cummins
Interesting. 10K is hardly enough miles to have much if any crud buildup and that message is not a valid one (I know you are not sure what it was) so wonder what it was?
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H3LZSN1P3R
You're doing it wrong
Actually it does in a way…. When it regens to burn off soot it runs hot and extra def is used when the hot exhaust passes the SCR to lower Nox so the hotter it burns the more DEF is needed to lower the gases to eliminate Nox…. The majority of the DEF is used when towing, during regens, and when you are stomping the skinny pedal….
H3LZSN1P3R
You're doing it wrong
You were on the right path actually
John Jensen
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Thanks for the confirmation. I was somewhat aware of what cetane is and how it speeds up the combustion process so my thinking was it has a hotter burn thus need less of the DEF to compensate. I've been a gas guy my whole life, well lots of Ethanol/ E85 for the past 12+ years too, so now I have to learn about a new fuel that I've never owned. I can say that I'm not a fan of the smell of diesel, both raw fuel and thru exhaust too
H3LZSN1P3R
You're doing it wrong
I will say the DEF he would go through would not change much by additives but there can be some improvement…. And i love the smell of diesel on a cold start morning More so on the old second gen when it drops 3cyl and idles up to 1200 rpm lol
freeram
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Fuel filter service required message, both times after adding Diesel Kleen. the first time on my 17 Ram 3500 I thought it strange, but when it happened on my 19 I thought this is more than a coincident. I will not be adding it to my 2022.