What is the original 10 engine oil now?

Variable speed oil. The original 10 engine oil, namely 10 total loss system oil, namely variable speed engine oil, is a light oil component distilled at atmospheric pressure in the atmospheric and vacuum distillation process of petroleum refining. Made by traditional refining process, the quality is lower than 10 white mineral oil, and only contains a small amount of antioxidants. Its model is defined according to ISO standard, that is, it is detected by 40C industrial lubricants detection standard, and its viscosity is 65433.