Viscosity class of engine oil product, SAE

One class viscosity engine oil

  • This oil has only one kind of features which works well in low temperature or in high temperature like SAE 10W, SAE 20, SAE 30 etc.
  • This oil is used in place where there is not much temperature change.

Diverse class viscosity engine oil

  • For example of SAE15W-40 product, it has two features of SAE 15W(working well in low temperature) and SAE 40(working well in high temperature)
  • Oil is stiff in low temperature and watery in high temperature. Diverse class viscosity engine oil is a bit watery in low temperature and is not too watery in high temperature.

It is most popularly used product in the world.