How to calculate Total Wear Metals & LSJ oil analysis methodology

[kschachn]

In his video he seemed to lean into the premise that a standardized test for an oil can't tell how it would perform in the end-users specific engine, climate and driving conditions. It sounded like he was saying to start with the OE recommendation to understand a baseline wear for your personal behavior, then adjust as needed/desired.

That's a problem because in this case no results could be reliably compared.

I still go back to the notion that wear by spectrographic analysis is including many variables besides the oil. Wear due to the oil isn't all you're measuring and how is it being isolated?

Obviously I've never done a statistical analysis, but my suspicion is that with modern oils the wear due to the oil brand is not a first order effect in a cheap UOA.

 

[CarlB]

That's a problem because in this case no results could be reliably compared.

I still go back to the notion that wear by spectrographic analysis is including many variables besides the oil. Wear due to the oil isn't all you're measuring and how is it being isolated?

Obviously I've never done a statistical analysis, but my suspicion is that with modern oils the wear due to the oil brand is not a first order effect in a cheap UOA.

I got the impression from his videos that it isn't just "oil" analysis but more of "engine" analysis, since he explains it can tell you about other happenings like fuel dilution and other engine or driving events unrelated to oil quality. However you can get some red flags about oil during the process, say viscosity drop from shear.

For example: Not sure I would care about statistical analysis if we see my engine has a stuck injector resulting in extreme fuel dilution.

 

[kschachn]

I got the impression from his videos that it isn't just "oil" analysis but more of "engine" analysis, since he explains it can tell you about other happenings like fuel dilution and other engine or driving events unrelated to oil quality. However you can get some red flags about oil during the process, say viscosity drop from shear.

For example: Not sure I would care about statistical analysis if we see my engine has a stuck injector resulting in extreme fuel dilution.

In the narrative posted with the video he’s attempting to correlate the spectrographic analysis to brand.

 

[CarlB]

In the narrative posted with the video he’s attempting to correlate the spectrographic analysis to brand.

Then we each got different messages from this video.

 

[chris719]

If basic UOA was sufficient to serve as a wear measurement, why would every oil approval require engine teardowns or radionuclide methods to measure wear?

 

[CarlB]

If basic UOA was sufficient to serve as a wear measurement, why would every oil approval require engine teardowns or radionuclide methods to measure wear?

Seems like the juice isn't worth the squeeze if a consumer is attempting to select an oil for their specific use-case to do no-more harm than the OE recommendation.