The oil testing standard is as follows:

1. Introduction 1:GB/T1995-1998 Calculation method of viscosity index of petroleum products. This standard specifies the method for calculating the viscosity index of lubricating oil and related substances from the kinematic viscosity at 41 and 111.

2. introduction 2:GB/T17476-1998 determination of added elements, worn metals and pollutants in waste lubricating oil and some elements in base oil (inductively coupled plasma emission spectrometry) this standard stipulates that the contents of added elements, worn metals and pollutants in waste lubricating oil and various selected metal elements in base oil or regenerated base oil shall be determined by inductively coupled plasma emission spectrometry. The determined elements include aluminum, boron, barium, calcium, copper and iron.

3. Introduction 3:GB/T8926-2112 Determination Method of Insoluble Matter in Lubricating Oil in Use. This standard specifies the determination method.

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