| abstract |
The present invention relates to a crosshead type cylinder lubricant oil for a diesel engine which is capable of suppressing the amount of piston sediment even when there is no problem with fuel of any sulfur amount, for example, excessive alkali, in addition to the conventional performance such as heat resistance, cleanliness and abrasion resistance (B) an ashless dispersant and (C) a metallic detergent, wherein the sum of the number average molecular weight of the ashless dispersant (B) and the effective concentration is 9000 or more , And the metal-based cleaner (C) has an endothermic peak temperature of 460 占 폚 or less at a heating rate of 50 占 폚 / min as measured by DSC. |