单项选择题
Which of the following conditions could be a cause of excessive fuel dilution of diesel engine lube oil?（）
A.Leaking fuel injectors B.Lower than normal compression C.Delayed fuel injection D.All of the above are correct
单项选择题 When the opening pressure of a diesel engine fuel injector is greater than that specified by the engine manufacturer, which of the following problems can be expected?（）
单项选择题 A properly honed diesel engine cylinder liner will（）
单项选择题 A diesel engine is supercharged in order to（）
