We explain how the viscosity index describes the viscosity behavior of oil in response to temperature changes and how it should be interpreted in product selection.

We provide a technical explanation of the conditions under which ISO VG 68 hydraulic oils are preferred and the differences in selection compared to ISO VG 46.

We explain the viscosity class of ISO VG 46 hydraulic oils, their areas of application, and the technical criteria to be considered in selecting the correct product.