单项选择题
Which of the following problems may occur when using fuel oil with a high sulphur content?（）
A.Injection lag B.Lube oil dilution C.Pre-ignition D.Corrosion
单项选择题 Burning fuel with a high sulfur content in a diesel engine will （）
单项选择题 Leaking oil seals on a diesel engine turbocharger can cause（）
单项选择题 If the back clearance of a piston ring is excessive,（）
