What are the advantages of a multigrade oil ?
A multigrade oil is one whose properties have been artificially modified to reduce changes in its viscosity with temperature changes. A multigrade oil will be more fluid at low temperatures and thicker at high temperatures than a monograde oil. Concretely, that means that • when the vehicle is not being used (for several hours), the engine oil sinks in the crankcase so that, on starting, it takes a certain amount of time (a few microseconds) to again reach all parts of the engine that need to be lubricated. Since a multigrade oil is more fluid at low temperatures, it reaches the various engine components more quickly than a monograde oil, thereby reducing wear on starting. • Multigrade oil allow “saving fuel” around 1.5% to 3% then monograde oil Multigrade oils provide better engine protection at low and high temperatures than monograde oils, in that they maintain optimum viscosity over the engine operating temperature range.
