Question 1

What is Saybolt viscosity?

Accepted Answer

Time for 60 mL of oil to flow through calibrated orifice. SUS (Saybolt Universal Seconds). US petroleum standard.

Question 2

How do you convert Saybolt to centistokes?

Accepted Answer

Approximate: cSt = 0.226×SUS - (195/SUS) for SUS>100. Exact formula varies with temperature.

Question 3

What's the difference between dynamic and kinematic viscosity?

Accepted Answer

Dynamic viscosity (Pa·s, cP) measures flow resistance. Kinematic viscosity (m²/s, cSt) is dynamic viscosity divided by density, used in flow calculations.

Question 4

How does temperature affect viscosity?

Accepted Answer

Liquids generally become less viscous (thinner) when heated. Motor oil ratings (like 10W-40) indicate viscosity at cold (W) and hot operating temperatures.

Saybolt to Centistokes Converter

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