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A high viscosity index is always desired for lubricating oils as it can be used in severe winter and summer conditions.

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A high viscosity index is always desired for lubricating oils as it can be used in severe winter and summer conditions.

(a) True

(b) False

The question was asked in my homework.

My question is from Properties of Lubrication topic in chapter Engine Friction and Lubrication of IC Engine

1 Answer

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by (65.4k points)

The correct answer is:

(a) True

A high viscosity index (VI) is indeed desirable for lubricating oils because it indicates that the oil's viscosity changes less with temperature. This allows the oil to perform well across a wide range of temperatures, from severe winter cold to hot summer conditions, providing consistent lubrication and protecting engine components.

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