@@Tadokoro_koouji Kenneth M. “Tyger, director of Technical Services, Penn Grade/PennGrade1 Lubricants Once again, this depends on the design of the engine. Turbocharged engines usually run much hotter-sometimes 250 to 300 degrees Fahrenheit. Generally, you want to try to keep the oil in the range of 220 to 260 degrees Fahrenheit. Temperatures above this may raise evaporation loss and shear issues.” 以上是来自互联网search, 260F=126.6C , 300F=148.8C 你多做点功课再说。