We used Blackstone for a couple of years. They alerted us to the fact that
the aluminum content had shot up. Ended up doing a top overhaul. Previously
the leak down tests were ok. We had heard this can change quicky which it
did. The analyiss was the trigger. AME said things would be been fine for
about another 100 hours but we did the top anyway.

A lot of people on the field laughed at doing the analysis every oil change.

"Doug" wrote in message
om...
I have been using Metal Check and the results are always about the
same, and they say it is no problem. I am interested in any stories
out there about oil analyisis that indicated a problem, and resulted
in engine work, just what happened and how the oil analysis helped or
did not help predict the problem.

Any real life stories?