Viscosity Index (ASTM D2270)
Calculate viscosity index from two temperature/viscosity data points using ASTM D2270
Input Data
Enter two viscosity measurements at different temperatures
Results
Calculated viscosity parameters
Enter your data and click Calculate
Quick Tip
The Viscosity Index (VI) indicates how much an oil's viscosity changes with temperature. Higher VI means more stable viscosity. Most modern engine oils have VI between 95-170.