单选题Which harmful consequence may be the result of lube oil sludge accumulation? （）AClogged oil pump suction screensBIncreased oil operating temperaturesCSticking piston ringsDAll of the above
单选题
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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