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SAE

Due to manufacture the now resulting possibility oils for specific temperature operations, SAE (Society of Automotive Engineers refer to a union in the U.S.) SAE has defined classes. These have now been introduced in most countries of the world for the classification of motor oils and automotive gear oils. It corresponds to the meaning of this classification, that it makes only a classification of the viscosity. Information on the quality of the oils, their uses and their accessories may not give the division. In Germany, the SAE viscosity classes according to DIN 51 511 (engine) and DIN 51 512 (gear oils are specified).
Herein are defined:
Temperatures for the viscosity measurement, viscosity values and class assignment.
The viscosity at a temperature of 100 ° C with engine and Getriebeölengemessen. In the engine area, but this is
not practical. Therefore, in Germany, the temperature measured at 150 ° C in addition.
Oils, for which the viscosity limits are set out in the cold state, have in addition the value "W" (winter). e.g. SAE 0W-30.

Conventional viscosity classes are for example:

J300 SAE - Motor:

Monograde - Engine Oils
In Monogrades VI will only measured at 100 ° C. Depending on the season or climate zone, an oil change be made in order to ensure sufficient lubrication of the engine. The class specifies a number indicating the lowest possible use of oils in winter temperature and summer oils, the maximum operating temperature. Winter oils will also receive nor the "W" as an identifier for a winter oil.

Viscosity class Area of application Use at approx.
in relation to climatic zone and/or time of the year Outside temperature
-----------------------------------------------------------------------------------------
SAE 0W-5W Winter oil for nordic countries beyond -30 °C
SAE 10W Winter oil 0 to -20 C°
SAE 15W Winter oil -15 to +20 °C
SAE 20W-20 Winter, summer oil, according to climatic zone -10 to +20 C°
SAE 25W Winter oil fin mild climatic zones 0 to +30 °C
SAE 30 Summer oil up to +30 C°
SAE 40 Summer oil, for southern countries +15 to +40 C°
SAE 50 Summer oil for tropical countries above +40 °C

Multi-grade - Engine Oils
For multi-grade oils, two viscosity classes are defined which are distinguished by a „W“. The number before the „W“ describes the lowest possible application temperature such as mono-grade oils. The number after the “W”, the summer number, determines the highest possible application temperature. The VI of a multi-grade oil is measured at 40°C and at 100°C.

Viscosity class Area of application Use at approx.
in relation to climatic zone and/or time of the year Outside temperature
------------------------------------------------------------------------------------------
SAE 0W-30 All-season oil below -30 to +30°C
SAE 0W-40 All-season oil below -30 to +40°C
SAE 5W-30 All-season oil below -20 to +40°C
SAE 5W-40 All-season oil below -20 to +40°C
SAE 5W-50 All-season oil below -20 to +50°C
SAE 10W-30 All-season oil -20 to +20 C°
SAE 10W-40 All-season oil -20 to +40 C°
SAE 10W-50 All-season oil -20 to +50 C°
SAE 15W-40 All-season oil -20 to +50 C°
SAE 20W-50 All-season oil -10 to +40 C°


Motor vehicle gear oils:

Single-grade gear oils
Viscosity class Area of application in relation to
climatic zone and/or time of the year
-------------------------------------------------------
SAE 70 W Special oil for nordic countries
SAE 75W Winter oil
SAE 80W Winter oil
SAE 90W Summer oil
SAE 140W Summer oil for specific areas of use

Multigrade gear oils
Viscosity class Area of application in relation to
climatic zone and/or time of the year
-------------------------------------------------------
SAE 75W-90 All-season oil
SAE 80W-90 All-season oil
SAE 85W-140 All-season oil/summer oil

Note
For motor vehicle gear oils, the selection of the SAE classes is carried out more rarely according to the climatic zone and/or the outside temperature, but rather according to the gear type, like for example change-speed gears, driving axle, planetary hub reduction axle, etc.
For this reason, the manufacturers instructions have to be complied with in any case.








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