Which harmful consequence may be the result of lube oil sludge accumulation? （）<br>A:Clogged oil pump suction screens<br>B:Increased oil operating temperatures<br>C:Sticking piston rings<br>D:All of the above

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

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