单选题 1分

Which lubricating oil additive is used in diesel engines to reduce the tendency for sludge and varni...

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

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