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Higher the oil viscosity ____________ is the friction loss.

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in IC Engine by (46.8k points)
Higher the oil viscosity ____________ is the friction loss.

(a) lower

(b) greater

(c) unpredictable

(d) none of the mentioned

The question was asked during an online interview.

Question is taken from Engine Friction in portion Engine Friction and Lubrication of IC Engine

1 Answer

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by (65.4k points)

The correct answer is:

(b) greater

Higher oil viscosity generally leads to greater friction losses. While thicker oils provide better lubrication and reduce wear, they also increase resistance to flow, which can raise friction losses, especially at higher engine speeds or during cold starts.

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