In article ,
"Edgar" wrote:

That test shows only contaminants and I see they include carbon.
Carbon will always be present in the sump oil of a diesel to some degree so
this test is usually going to show it up..

Just a NOTE here.... SOME OEM's put trace elements in their Bearing
Compositions, so as to Identify each individual Bearing in an engine,
should it begin to fail. By doing a Mass Spectrum analysis on the
used Oil, one can identify any bearing that is shedding material in
excessive quantities. CAT does this and REQUIRES Oil analysis be done
if the engine is on one of their Maintainance Agreements.

--
Bruce in alaska
add path after fast to reply