| abstract |
It contains a base oil and (A) a metallic detergent, a base value is 15-125 mgKOH/g, and a kinematic viscosity in 100 degreeC is 10-30 mm<2>/s, which satisfy|fills the requirements of following (i) or (ii) , Cylinder lubricating oil composition for crosshead diesel engines with scrubber: (i) (B) 0.02-5.0 mass % of demulsifiers are contained; (ii) as component (A), (A1) Ca phenate detergent and (A2) Ca phenate detergent contains metallic detergents other than (C-1') at least one alkyl group or alkenyl group in the molecule It contains 0.015 mass % or less of succinimide or its boronated derivative as nitrogen content, and does not contain, and Ph value represented by following formula (1) is 20x10 -3 or less. Ph value = C Ca × 2/(r M × 40.08) … (One) (In Formula (1), C Ca represents the calcium content (mass %) derived from the component (A1), and r M represents the metal ratio of the component (A1).) |