In the United States, oil viscosity is measured in which units?

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Multiple Choice

In the United States, oil viscosity is measured in which units?

Explanation:
Oil viscosity is commonly expressed in Saybolt Universal Seconds in the United States. This unit comes from the Saybolt viscometer and measures how long it takes a fixed volume of oil to flow through a calibrated orifice at a specified temperature. The result is a time in seconds—the higher the number, the more viscous the oil. Other units exist (centistokes is the metric kinematic viscosity, Redwood numbers are an older, less common scale, and poise is a CGS unit of dynamic viscosity), but SUS is the standard in US petroleum labs and industry.

Oil viscosity is commonly expressed in Saybolt Universal Seconds in the United States. This unit comes from the Saybolt viscometer and measures how long it takes a fixed volume of oil to flow through a calibrated orifice at a specified temperature. The result is a time in seconds—the higher the number, the more viscous the oil. Other units exist (centistokes is the metric kinematic viscosity, Redwood numbers are an older, less common scale, and poise is a CGS unit of dynamic viscosity), but SUS is the standard in US petroleum labs and industry.

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