Elevated metal levels present in a recent sample of used diesel engine crankcase lubricating oil is indicative of a condition. What would high silicon levels indicate?

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Accepted Answer

The lubricating oil has become contaminated with sand, dust, and dirt.

Answer

The lubricating oil's detergent additives have become depleted.

Answer

The lubricating oil has become contaminated with engine coolant.

Answer

The lubricating oil has become excessively diluted with fuel oil.

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