The interactions between molecular chains are significant at low temperatures. The interactions decrease as the temperature rises, compensating for the loss of viscosity. This guarantees that the lubricant provides complete protection to the equipment at both high and low temperatures. Viscosity improvers also make it possible to make multigrade oils, eliminating the requirement for seasonal oil changes. When low-viscosity oils are thickened with viscosity index improvers, the oil thickens as the temperature rises. As a result, mineral oils' lubricating properties can be extended over a larger temperature range.
Matthews Jorgensen
Kock Mackenzie
Kincaid Cook
Stack Power
Chapman Mckinley
Crowell Arthur
Song Heller
Somerville Kappel
Burnette Westh
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