What benefits can I expect from Multigrade oils?
Multigrade oil, basically, is oil whose viscosity properties have been changed artificially in order to slow down its rate of change of viscosity with temperature. Thus, multigrade oils tend to be thinner at low temperatures and thicker at high temperatures than monograde oil. There are several benefits one may expect of multigrade oil. • When a car is at rest for a few hours, all the engine oil comes down to the oil sump. Thereafter, as soon as the car is started there is a certain time (probably only microseconds) before the oil reaches all the parts of the engine once again. Since the multigrade oil is thinner at low temperatures, it reaches all parts of the engine quicker than monograde oil and hence, reduces wear to that extent. • Generally, it has been observed that use of multigrade oils enables better fuel economy of 1.5% – 3%. • Multigrade oil offers better protection to the engine at high temperatures than monograde oil, since it is thicker than the monograde oil at temperatu
