A turbine oil used in a turbine of a jet engine, containing: a base oil (A) containing a polyol ester (A1); an antioxidant (B) containing an amine-based antioxidant (B1); a polymethacrylate (C) having a weight average molecular weight of 50,000 to 600,000; and an alkyl aromatic compound (D), having a content of the component (D) of 1,000 parts by mass or less per 100 parts by mass of a total resin content of the component (C), and satisfying the following requirements (1) and (2): requirement (1): a viscosity index of 140 or more; and requirement (2): a coking amount attached to a panel of 80 mg or less after a panel coking test under the prescribed condition. The turbine oil has a high viscosity index to such an extent that an oil film can be retained in the use under a high temperature environment as in a turbine of a jet engine mounted on an aircraft, and is excellent in low temperature viscosity characteristics while retaining excellent heat resistance.
一种用于喷气发动机涡轮机的涡轮机油,含有含有多元醇酯(A1)的基础油(A);含有
胺类抗氧化剂(B1)的
抗氧化剂(B);重量平均分子量为 50,000 至 600,000 的聚
甲基丙烯酸酯(C);以及烷基芳香族化合物(D),组分(D)的含量为每 100 份(质量)组分(C)总
树脂含量的 1,000 份(质量)或以下,并满足以下要求(1)和(2):要求(1):粘度指数大于或等于 140;以及要求(2):在规定条件下进行面板结焦测试后,附着在面板上的结焦量小于或等于 80 毫克。涡轮机油具有较高的粘度指数,在高温环境下使用时可保持油膜,如在飞机上安装的喷气发动机涡轮机中使用,并且在保持优异耐热性的同时,还具有优异的低温粘度特性。