With a machinery lubricating oil analysis program, it is important to monitor trends over time. What would be indicated by a sudden increase in metallic content of a recent sample of used diesel engine crankcase lubricating oil?

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Accepted Answer

Increased wear rates of engine parts

Answer

Sudden dilution of the lubricating oil with fuel

Answer

Depletion of lubricating oil additives

Answer

Sudden contamination of the lubricating oil with coolant

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