单选题Which of the following characteristic of lube oil helps to reduce the amount of deposits in the piston ring belt during the combustion process in a diesel engine?（）ALow viscosity indexBLow carbon forming tendenciesCHigh film strengthDHigh non-corrosive qualities
单选题
Which of the following characteristic of lube oil helps to reduce the amount of deposits in the piston ring belt during the combustion process in a diesel engine?（）
A
Low viscosity index
B
Low carbon forming tendencies
C
High film strength
D
High non-corrosive qualities
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