Tuesday, May 31, 2011
Select The Right Viscosity Lubricating
Lubricant viscosity level which is also called "Viscosity-Grade" is a measure of lubricant viscosity and the ability to flow at a given temperature
Oli identifier code is a letter SAE which stands for Society of Automotive Engineers. Furthermore, the number who follow behind, shows the level of the oil viscosity. SAE 40 or SAE 15W-50, the greater the numbers that follow Code indicating the thick oil is oil.
While the letter W located behind the initial figure, which stands for Winter. SAE 15W-50, meaning it has a high viscosity oil SAE 10 for the conditions of cold temperatures and SAE 50 in summer temperature conditions. With these conditions, oil will provide optimal protection during the engine start in extreme conditions though.
Meanwhile, in a normal summer conditions, oil will work ideally in the range of 40-50 viscosity number according to SAE standards.
See Manual Vehicle ...
SAE GRADE LUBRICATING GUIDE FOR MOTOR VEHICLE PASSENGER
Grade Lubricant consisting of singlegrade / monograde such as SAE 15 and SAE 50 (used at extreme temperatures) as well as Multigrade SAE 5W-50 and 15W-50 is widely used (unless the temperature is very hot or very cold) because it is quite watery lubricant to flow at low temperatures and thick enough to work satisfactorily at high temperatures.
More specifically we use the following illustration:
There are 3 Oil, 1 Multigrade, 2 monograde
Oil 1 SAE 15 (dilute)
Oil 2 SAE 50 (condensed)
3 Oil SAE 15W50 (Multigrade)
Oil was taken third place, the cold temperature:
Oil 1 (SAE 15) will be more viscous due to cooler
Oil 2 (SAE 50) to freeze because their home has been condensed
Oil 3 (SAE15W50) Oil viscosity will be equal to 1 (SAE15)
Now all three Oil was taken to place the hot temperature, then:
Oil 1 (SAE 15) becomes very watery even be yawning all
Oil 2 (SAE 50) becomes more dilute
Oil 3 (SAE 15W50) Oil viscosity equal to 2 (SAE 50)