One of the main properties of motor oil is its viscosity – ability to flow and remain on the surface of friction parts. The international standard that describes the viscosity of the oils, is an SAE specification.
According to her, the viscosity of motor oil are divided into 3 types:
Examples of signs
SAE 20, SAE 30, SAE 40, SAE 50, SAE 60
SAE 0W, SAE 5W, SAE 10W, SAE 15W, SAE 20W, SAE 25W
SAE 5W30, SAE 5W40, SAE 10W30, SAE 0W20, SAE 0W50
In the designation of summer oil SAE figures after indicate high temperature oil viscosity, to decrypt the value which is possible using a special table matching the viscosity of the oil.
Summer motor oil for your car should be selected based on the recommendations of the manufacturer of your car, which must be in the documentation for the car.
In addition, many car manufacturers, given the high thermal stress of the modern internal combustion engines, it is recommended to choose a summer oil class 40 or 50.
Winter oil in its designation letter "W" means it's winter (from "winter"), and the numbers in front of him – a low viscosity oil.
In simple, human language, if the class of low-temperature viscosity of the oil to take 40, get the temperature to which the oil maintains viscosity, sufficient for safe cold start of the engine.
For example: winter oil SAE 20W can be used when the air temperature is not lower than -200 C. if the thermometer drops below, you should go to a SAE 10W or SAE 0W.
Multigrade oil is labelled first winter, and then summer oils. About what they mean, we just did.
Again – pour in the engine oil, only the viscosity which is provided by the manufacturer of your iron horse, otherwise inevitable loss of power of the engine, the wear of its parts and, as a consequence, the output of the engine.
Operational properties ACEA
ACEA specification describes the performance characteristics of oils and their quality:
The purpose of the oil
Examples of signs
Petrol engines of passenger cars, minibuses and vans
A2-96, A3-96, A5-2002
Diesel engines of passenger cars, minibuses and vans
B2-96, B3-96, B5-2002
The engines of trucks and road trains
E2-96, E3-96, E5-99
Petrol and diesel engines of new generation
C-1, C-2, C-3, C-4
After reading the article the symbols on the labels of oil already is not difficult. Now select the oil type, viscosity grade and performance properties to replace them worked, can anyone.