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Viscosity Index

Definition:

Viscosity Index represents an oil's change in viscosity with respect to changes in temperature. The viscosity index of an oil is determined experimentally by testing its viscosity at 40°C and 100°C.

Standard Test Method Used:

ASTM D2270

Reporting Measurement:

Calculation

Amount of Sample Needed:

2 mL

Test Limitation:

Requires both viscosity at 40°C and 100°C.


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