Which harmful consequence may be the result of lube oil sludge accumulation? .A.Clogged oi

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Which harmful consequence may be the result of lube oil sludge accumulation? .

A.Clogged oil pump suction screens

B.Increased oil operating temperatures

C.Sticking piston rings

D.All of the above

请帮忙给出正确答案和分析,谢谢!

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