Whether it's an actor onstage or an engine, a break in character can speak to a problem, but not always do increases in wear or indicators of contamination result in a problem. Instead, a break in character (or trends) can be the result of wear-in from repairs, or a newly-installed part. In this episode, Blackstone Joe unpacks exactly this type of shift where an engine that had built a reputation for wearing well and not struggling with contaminants suddenly took a turn in another direction, with high levels that had more than one possible explanation. Listen as Blackstone Joe details the findings, what they could mean, and how communication with the owner helped solve the mystery

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