单选题A sudden decrease in the diesel engine lube oil viscosity could be an indication of（）Aloss of additives from the lube oilBcarbon deposits in the lube oilCexcessive centrifugingDexcessive fuel dilution
单选题
A sudden decrease in the diesel engine lube oil viscosity could be an indication of（）
A
loss of additives from the lube oil
B
carbon deposits in the lube oil
C
excessive centrifuging
D
excessive fuel dilution
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