Question

IX. A lubricant should possess high-
(a) Volatility
(b) Oilness
(c) Acidity
(d) None of these​

Answer 1

oilness

it will increase its viscosity

Answer 2

It decreases (thins) with increasing temperature and increases (or thickens) with decreased temperature. The benefits of oils with a higher viscosity is that a general increase in viscosity at higher temperatures results in lower oil consumption and less wear, which is profitable for the environment.