What is SAE?

We have said that the degree of viscosity of engine oils is generally determined by the SAE J 300 standard. But how to determine this degree of viscosity? As you can see in the table below, to determine the degree of viscosity, it is enough to determine the viscosity of oils at 100 degrees Celsius.
After determining the degree of viscosity at 100 degrees, we come to the table. In oils 20 and above, the allowable viscosity range of each degree of viscosity is well known and the degree of viscosity can be easily determined by comparing the viscosity with the table. For example, oil with a viscosity of 16.3 to 21.9 is in the range of 50 degrees of viscosity.
But there are other points in this table. Oils 25W and below do not have a temperature range of 100 degrees and only the minimum viscosity at this temperature is considered. These degrees are accompanied by W. In fact, they are winter oils and should be able to behave in the right cold. The Brookfield test is used to determine this appropriate behavior. In this test, the viscosity of oils is measured at sub-zero temperatures and, of course, in units of centipoise. The measurement is also based on determining the torque required to move a piece to a single surface in the oil. In simple terms, 60,000 cmp is the psychological amount of oil needed to be pumped by the car’s oil pump. Now, the lower the viscosity of winter oil, the lower the temperature, and in fact, the more winter oil we have.
After determining the degree of viscosity at 100 degrees, we come to the table. In oils 20 and above, the allowable viscosity range of each degree of viscosity is well known and the degree of viscosity can be easily determined by comparing the viscosity with the table. For example, oil with a viscosity of 16.3 to 21.9 is in the range of 50 degrees of viscosity.
But there are other points in this table. Oils 25W and below do not have a temperature range of 100 degrees and only the minimum viscosity at this temperature is considered. These degrees are accompanied by W. In fact, they are winter oils and should be able to behave in the right cold. The Brookfield test is used to determine this appropriate behavior. In this test, the viscosity of oils is measured at sub-zero temperatures and, of course, in units of centipoise. The measurement is also based on determining the torque required to move a piece to a single surface in the oil. In simple terms, 60,000 cmp is the psychological amount of oil needed to be pumped by the car’s oil pump. Now, the lower the viscosity of winter oil, the lower the temperature, and in fact, the more winter oil we have.