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Auto Kinematic Viscometer Operations @40 °C

The term viscosity is defined as the internal resistance of a liquid to flow. Kinematic Viscosity is the measure of the resistive flow of a fluid under the influence of gravity. The S.I. unit for the measurement of viscosity is the centistoke (cSt). When an oils’ viscosity increases, this means the oil is getting thicker. The most common cause of increased viscosity is oxidation. Oxidation is a normal process of a lubricant and is the reason for most oil changes.

Importance of the Viscosity Test

The viscosity test is considered the most imperative property of lubricating oil, and an active indicator of the oils’ function ability. The viscosity can be used to indicate high operating temperatures, contamination of another fluid, overloading, and water/coolant contamination conditions. An increase or decrease in viscosity can lead to overheating, increased friction, and ultimately catastrophic failure.

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