- Published: January 2021
- Reapproved: 2021
Overview:
This method indicates the tendency of a lubricating oil to deteriorate on oxidation under specified conditions. A measure of the deterioration is obtained by comparison of the viscosity and carbon residue before and after oxidation. The test is not suitable for additive-type oils (other than those containing ashless additives) or those which form solid products or lose more than 10 % by evaporation during the test.
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