Viscosity index improvers

Viscosity index improvers are additives used in lubricants, like engine oils, to enhance their performance across a range of temperatures. They help maintain the oil's thickness (or viscosity) when it is heated, which can otherwise thin out and become less effective. By improving the viscosity index, these additives ensure that the oil remains stable and protective in both cold start conditions and high-temperature environments. This leads to better engine performance, reduced wear and tear, and improved fuel efficiency, making them a crucial component in modern lubrication technology.