Negative Article About Use of Moly in Engine Oil

[Islander]

I came across an article which would cause a lot of people to be concerned about using engine oil that contains Moly. The articel says that Moly compounds can degrade and cause bearing corrosion and is particularly harmful to copper. It further says that in most cases, engine oil having moly will also contain a copper deactivator to protect the bearings but the deactivator decomposes at low temperatures and loses it's potency after a few thousand miles. See this website: http://lubesolutions.com/html/molyeo.html

 

[Gurkha]

The latest Delo 400 CI-4+ has moly, I think Delvac Super always had some too, these oils are Cummins certified if I am not mistaken.

 

[Steve S]

Different kind of moly.

 

[Pablo]

May 1996

 

[GROUCHO MARX]

Well, as long as it's current.

 

[MolaKule]

Outdated information.

Why this rumor still persists is anyone's guess.

 

[Islander]

quote:

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Originally posted by GROUCHO MARX:
Well, as long as it's current.

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The trouble with these articles is that they sit there on a commercial website which has current links to business partners. Consequently an uninformed person doesn't know what it think, i.e. whether or not it has any merit. In many ways, I fit my reference to an uninformed person. However, I immediately concluded that the article has no merit because I have been following this discussion forum. On the other hand, if I hadn't been reading this forum, the article probably would haved caused me concern about using any engine oil that I understand has moly in it.

 

[salesrep]

Really disappointed in the source. Regardless of the year. In the past I always gave Hydrotex the benefit of the doubt when comparing co.s and fluids....Not anymore. The api cert statement is a flat out an untruth.
The thing is the website is current while using this article to "unqualify moly enhanced engine oil"

 

[Gurkha]

With M-I 15W-50, in summers in NY, I would regularly put Mr. Moly additive on my Accord V6, the engine lasted for 500,000+ miles with ease. Don't think moly had any ill effects whatsoever.

 

[fuel tanker man]

Old info, perhaps, but the heavy doses of moly in Redline oils, and the commensurate (and seemingly obligatory) copper and lead numbers in most Redline UOA's do nothing to disprove the authors contentions.

Dan

 

[mechtech]

Well, as long as it's current!
Nice.

 

[MolaKule]

This was discussed about two years ago and it continues to resurface each year, but please let me reiterate by commenting on this statement and attempt to clarify:

quote:

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"There is firm evidence that certain friction modifiers, molybdenum dithiophosphate for example, can in certain formulations result in cam follower pin failure at relatively low mileage"........

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Molybdenum dithiophosphates are to be used in hydraulic and similar fluids such as R&O as AW's, friction modifiers, and anti-oxidants; If a blender used this in diesel oils, then that blender was an idiot.

It is molybdenum dithiocarbamates and similar derivates that are used in engine oils. In any formulation, one must balance the additives so there is no additive interaction. The additive balance should be one of synergism, not antagonism.

 

[bruce381]

"From years working with engine test programs to approve engine oil formulations for API licensing, we can tell you that NO engine oil containing Molybdenum additives has been certified by the full range of engine tests necessary to gain API approval."

Wrong not right wrong info.
bruce

 

[Steve S]

quote:

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Originally posted by bruce381:
"From years working with engine test programs to approve engine oil formulations for API licensing, we can tell you that NO engine oil containing Molybdenum additives has been certified by the full range of engine tests necessary to gain API approval."

Wrong not right wrong info.
bruce

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bruce do you work at the oil place in Belmont / San Carlos ? been a while since I lived in the bay area.

 

[bruce381]

Yes much cleaner now.
bruce

 

[DWC28]

In the US there are about four additive companies which make complete engine oil packages. One of them, Oronite, makes extensive use of moly in engine oils. They have many API approved packages. As I read the virgin oil analysis section, there also are many oils with Moly.

 

[Terry]

Dan, you are the only one that still holds to that opinion. You have the right.

Islander stated:
"The trouble with these articles is that they sit there on a commercial website which has current links to business partners. Consequently an uninformed person doesn't know what it think, i.e. whether or not it has any merit. "

Exactly why this website came into being !!

 

[buster]

quote:

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Old info, perhaps, but the heavy doses of moly in Redline oils, and the commensurate (and seemingly obligatory) copper and lead numbers in most Redline UOA's do nothing to disprove the authors contentions

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Nope, Honda oil, made by ExxonMobil at one time had over 600ppm of Moly. Old info. Nothing bad about the moly in engine oils at all. It's better to have it from what I've seen. Take a look at all the 20wt UOA's. They all share that in common.

 

[MolaKule]

quote:

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Old info, perhaps, but the heavy doses of moly in Redline oils, and the commensurate (and seemingly obligatory) copper and lead numbers in most Redline UOA's do nothing to disprove the authors contentions.

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The author of that article is deficient in his thinking to assume that one component out of 12 in formulated oils is going to make or break the total formulation.

It is the TOTALITY of the formulation that makes it what it is.

 

[Izb]

What about very high level of MOLY (850 ppm) in non-API oil MOTUL 300V?
Is this oil harmful for copper, tin and lead parts in engine?