A lubricating oil composition which is excellent in wear resistance, despite its low phosphorus content, low sulfur content and low sulfuric acid ash content, and which exhibits excellent friction reducing effect even when used for a DLC-treated sliding part, is provided by compounding a specific sulfur-containing compound and a specific polar group-containing compound in a base oil.
通过在基础油中加入特定的
含硫化合物和特定的含极性基团化合物,提供了一种尽管
磷含量低、
硫含量低和
硫酸灰分含量低,但却具有优异耐磨性的润滑油组合物,该组合物即使用于经 DLC 处理的滑动部件也能表现出优异的减摩效果。