单项选择题
A.low lube oil temperature
B.low lube oil pressure
C.high exhaust temperature
D.high cooling water pressure
单项选择题 Which of the listed conditions can cause a diesel engine to use too much lube oil?（）
单项选择题 Which of the following operational conditions will occur to the diesel engine lube oil at extremely high temperature?（）
单项选择题 The oxidation by-products forming in diesel engine lube oil can cause （）