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oil is most viscous at the lowest temperature, because as the temperature gets higher, the viscosity gets lower and such the flow rate decreases as well.

e.g- 19 degrees, 22 degrees, and 31 degrees C.

the most viscous is- 19 degrees C.

the least viscous is- 31 degrees C.

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11y ago
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11y ago

If you don't know one way or the other, that would be the way to bet.

However, it's possible to make motor oils of a blend of substances such that they don't substantially change viscosity as a function of temperature (over some specified range), and it's probably possible to make ones which are more viscous when hot.

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9y ago

Viscosity is a measurement to the oils resistance to flow. Therefore the temperature at which oil will still flow but has the greatest resistance is just above freezing temperature.

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15y ago

i un no

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Q: At which temperature is the oil most viscous?
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