Which lubricating oil additive is used in diesel engines to reduce the tendency for sludge and varnish to form on the engine parts?（）<br>A:Flash point improvers<br>B:Pour point improvers<br>C:Inhibitors<br>D:Foam suppressors

Which lubricating oil additive is used in diesel engines to reduce the tendency for sludge and varnish to form on the engine parts?（）
A:Flash point improvers
B:Pour point improvers
C:Inhibitors
D:Foam suppressors

出自：海船船员证

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