Posts Tagged: viscosity index

The Significance of Viscosity Index in Motor Oil and Lubricants

Understanding an Oil’s Viscosity Index and Its Impact on Engine Operation Viscosity is a measure of a fluid’s resistance to flow. For engine oils, viscosity determines how easily the oil can flow through the engine and lubricate moving parts. Low-viscosity oils flow more easily and quickly, while high-viscosity oils are thicker and flow more slowly. However, viscosity alone doesn’t fully describe how an oil will perform in an engine. For that, you need to know its viscosity index (VI). What is VI? The change in an oil’s viscosity due to … Read More