目前使用的В级和Г级机油的使用性能已不能满足具有较高寿命指标的新一代柴油机的需要。为此,根据科洛姆纳机车厂的倡议,开发了专供Д49型柴油机用的Д级机油。该项研究成果引起了俄罗斯铁路控股公司机务部门的重视。文内介绍了Д级机油在科洛姆纳机车厂进行的试验室试验和台架试验结果,并与目前使用的Г级机油的详细比较结果。 The current use of В and Г oil performance has been unable to meet the needs of a new generation of diesel engines with higher life expectancy. To that end, according to the initiative of the Kolomna Locomotive Works, Д level oil has been developed for the Д49 diesel engine. The results of this research have attracted the attention of the maintenance department of Russian Railways. The article introduced the Д level oil at Kolomna Locomotive Works laboratory tests and bench test results, and with the current use of Г grade oil comparison results.