That’s very helpful actually Rafe, thanks a lot!

Can someone explain how Constant-level Oilers work, isn’t there supposed to be a vacuum in the oil chamber, if the oil level drops rapidly wouldn’t it stop the flow?

Actually @chrysanthos.koul I found a pretty good forum from back in ’05 that discusses this exact issue: https://www.maintenance.org/topic/icml-versus-stle-certification

Thank you

That’s a great question @sergey.manevitch . To be honest I’ve not actually come across this – my guess would be that the incompatibility of Silicone lubricants with other oil types might pose a bit of. problem in cleaning some of the test apparatus, but beyond that I’m not sure.

What kind of effect does Silicone Oil have on Lab equipment?

No lab in my country is willing to take this oil for analysis…

Hi @chrysanthos.koul sorry my original message got wiped by an update. In general, I’d say that the STLE (CLS) body of knowledge is more focussed on lubricants, whereas ICML (MLA) is focused on lubrication.

I’d say that makes CLS better for lubricants sales/marketing/technical and ICML better for end users. But I guess if you’re on the…

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Hello all,

I saw some of you have completed or complete in the future, CLS exams.

Anyone who can identify the differences between STLE and ICML certifications?

I have read in the past that STLE are preferred more by tech/sales representatives who get to establish their relationships with customers, when on the other hand ICML is more useful…

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Actually, I should also add that EP additives are generally ineffective for this kind of failure mode, as they typically require heat to chemically bond with metal surfaces.

Hi @werner.ruster ! You can think of this as being a boundary lubrication problem. False brinelling is caused by slight movement of the rolling elements, so the speed is insufficient to develop any kind of lubricant film. The only thing that can protect you in these circumstances is some kind of antiwear additive – either surface active like…

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Dear all, how does a grease with false brinelling protection actually works ? How does the AW additive ZDDP do this ? For example Shell Rhodina grease BBZ and Klüber Kluperplex BEM 34-132 specially made for false Brinelling risks

Thank you!

Hi @sergey.manevitch, great question! Yes, I should clarify. When I said that Fe (ppm) isn’t important, I meant the absolute value. Let’s say you have 100 ppm. Is that high? Low? It varies by OEM and application type. Now say 500 hours later, the value is still 100 ppm. That’s good! This means there are no additional wear metals that have…

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Hi Rafe,

In one your youtube webinars on engine oil, you said that iron particles quantity is not important, can you explain what you meant, and is it for the engine oil or for the industry as well ?