Marine system oil composition and preparation method thereof

The invention provides a marine system oil composition which comprises the following components in 100 parts by weight: 1-5 parts of a detergent; 0-2 parts of a dispersant; 1-5 parts of an antioxidant; 0.1-1 part of a pour point depressant; 0.01 to 0.1 part of an anti-foaming agent; and 86.9 to 97.89 parts of base oil. The marine system oil composition disclosed by the invention has excellent water resistance, can be applied to lubrication of a crankcase of a two-stroke low-speed crosshead type diesel engine of a ship, and can also be used for lubrication of auxiliary equipment such as a hydraulic servo system and a tail shaft. 本发明提出了一种船用系统油组合物，以组合物重量为100重量份计，其组分包括：清净剂1～5份；分散剂0～2份；抗氧剂1～5份；降凝剂0.1～1份；抗泡剂0.01～0.1份；基础油86.9～97.89份。本发明的船用系统油组合物，具有优异的抗水性能，可应用于船舶二冲程低速十字头型柴油机曲轴箱的润滑，同时也可用于液压伺服系统及艉轴等辅助设备的润滑。