What grade is CF engine oil?

[LaArya]

CF engine oil is of medium grade, belonging to the category of diesel engine oil. The classification of diesel engine oil grades is as follows: 'C' represents diesel engine oil, ranging from CA, CB, CC, CD, CE, CF, CF-4, CG-4, CH-4, CI-4, to CJ-4. The further the letter is in the alphabet, the higher the quality grade of the oil. There are two main criteria for selecting the quality grade of engine oil lubricants: one is based on the combined mechanical and thermal load of the car engine, represented by the intensification coefficient; the other is based on the severity of the engine operating conditions. Engine oil is a substance enhanced with additives in base oil, mainly containing anti-wear additives, detergents, dispersants, and multi-grade oil viscosity index improvers.