Understanding the Viscosity Index: History, Challenges and Proposals This podcast discussion, in which lubrication experts discuss the important role of the Viscosity Index in the oil industry, features prominent industry figure Jack Zakarian. He explains the history of the Viscosity Index, its implications, and how the present scale hampers low viscosity oils. He also proposes potential improvements to the current scale that could make it better suited to the modern industry needs. Consequently, the podcast seeks to make industry players aware of the Viscosity Index's challenges and work towards solutions that will enhance its fairness and accuracy.