Quote:
Originally Posted by slowbrz
Which particles from Blackstone analysis is considered to be metal shavings? Are metal shavings from a brand new engine bad for the engine hence need to be changed right away?
I lack a lot of understanding of oil contaminants
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Depends on what you think "metal shavings" means?
A standar
d used oil evaluation usually includes:
ICP-AES(Inductively Coupled Plasma Atomic Emission Spectrometry)ICP-AES
which detects low levels of suspended wear debris in terms of mg/kg or ppm(parts per million)
For larger stuff(shavings?) ferrography tests add another level of knowledge.
"....Ferrography advantages:
By monitoring particles generated by wear or environmental contamination, Intertek ferrography experts are able to to detect the critical stage of accelerated wear that precedes costly and dangerous component failures. Ferrographic analyses determines the
number, size and shape of wear particles....."
UOA(Used oil analysis) is used for condition monitoring, and change from a baseline is important. In other words, while there are some absolute guidelines, knowledge of what is normal for your engine after viewing a few oil change analysis and change from what is normal is important. But it is still only an indicator. There are lots of variables to understanding UOA.
Professional guidance should be sought regarding understanding UOA results and before making decisions about repair needs based on oil analysis results.