|
Viscosity is defined as the measure of a fluids' resistance to flow.
The viscosity of an automotive oil is classified in SAE (Society of Automotive
Engineers) viscosity grades represented by numbers such as 30, 40, 50.
The higher the number, the thicker the oil and the greater it's effectiveness
in high temperature operations.
Lower numbered oils that are thinner oils with low viscosity are used
in cold climates as they flow more easily and are identified by a "W"
mark next to the grade of oil on the package.
Multigrade oils 5Wxx, 10Wxx, 20Wxx, etc. are suitable for both low and
high temperature conditions. Lubricating oils made specifically for industrial
use have their viscosity classified by ISO (international Organization
for Standardization) grades.
last updated on
|
