Question

why should the lubricant oils be of high viscosity?​

Answer 1

Viscosity is a measure of an oil's resistance to flow. It decreases (thins) with increasing temperature and increases (or thickens) with decreased temperature. ... The benefits of oils with a higher VI are: A general increase in viscosity at higher temperatures, which results in lower oil consumption and less wear.

Answer 2

so that they flow off that easily and there is less of friction.....hope this helps u