MS-12991 Question Regarding Soot in the Engine??

[Deleted User 38384]

So obviously, the whole point of oil in an engine is to lubricate the moving parts. In these modern diesels we have the EGR dumping spent fuel soot back into the engine. It causes the engines to run hotter, it also acts as a friction enhancer. If you ever cleaned out your EGR tube, it is quite literally soot. Grainy, not smooth, soot. Clearly having soot in your moving parts of your engine is going to need an oil that will function better with that increased friction, ie. an oil that provides friction reducers beyond normal oil.

Question:
The standard of the MS-12991 over other oil options without that standard; To what extent do you think that is because of the modern diesel dumping exhaust soot back into the engine?

Follow-up Question:
If you no longer have soot dumping back into the engine, would the need for the MS-12991 standard still be present, or could you then swap to a quality full synthetic without the MS-12991 standard?

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[grostage]

I was under the impression the turbo charger has very specific low ash oil requirements and without meeting these you will not have a turbo for very long. "follow manufacturers recommendations" is a statement some people take lightly but to each their own, i guess?

 

[Deleted User 38384]

I was under the impression the turbo charger has very specific low ash oil requirements and without meeting these you will not have a turbo for very long. "follow manufacturers recommendations" is a statement some people take lightly but to each their own, i guess?

Not to side rail my own thread, but if one were to disable the EGR, it would definitely throw more soot into the turbocharger. But realistically speaking all that means is you have to buy a bigger better turbocharger. Which realistically speaking if someone were to go that route, it would be an obvious upgrade eventually anyways. ??‍

But that is a good point, I didn't think about the turbocharger. ?

 

[grimmjeeper]

Ash collects in the DPF and isn't burned off during a regen. Eventually it will clog the DPF requiring that it be replaced.

There are processes for cleaning industrial DPF's. I'm not sure if that can be done to automotive filters. There are probably excessive regulations regarding getting a certified shop to do it.

 

[Ratbert]

Not to side rail my own thread, but if one were to disable the EGR, it would definitely throw more soot into the turbocharger. But realistically speaking all that means is you have to buy a bigger better turbocharger. Which realistically speaking if someone were to go that route, it would be an obvious upgrade eventually anyways. ??‍

But that is a good point, I didn't think about the turbocharger. ?

Note that big doesn't necessary mean better when talking about turbos. Bigger increases turbo lag since it takes longer to spool up. That would impact your low-end torque.

 

[Deleted User 38384]

Note that big doesn't necessary mean better when talking about turbos. Bigger increases turbo lag since it takes longer to spool up. That would impact your low-end torque.

Interesting.

Shit, I should twin turbo it!! So I might need to cut into the passenger footwell to do that. Thank God my wife is short, she wasn't using the legroom anyways!!

 

[TheNewGuy]

 

[Deleted User 38384]

 

[Tpsillos]

I would think you can run regular diesel oil in it. I've been running Rotella t6 the past 40k miles. I'll let you know how it goes long term.

 

[Deleted User 38384]

I would think you can run regular diesel oil in it. I've been running Rotella t6 the past 40k miles. I'll let you know how it goes long term.

I know there's a lot of the RAM 1500 EcoDiesel guys who run Rotella T6.

I actually have a coworker who is a car guy as well, but he has a little bit more engine knowledge than I do. When it comes to the turbo, he was telling me yesterday that I should just do normal treatment for the turbo by cleaning it out. He said spray a little carburetor cleaner in the engine from time to time, and that should take care of the turbo as well. He was saying the only part on the turbo that would fail is the bearing. So as long as I'm cleaning it, it should be fine for its normal lifetime.

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