Oil, which is known as the "blood" of the car, is known as the "blood" of the car. It can be the engine of lubrication, cleaning, cooling, sealing, and so on.

The engine is the heart of the car, there are many friction movement of the metal surface of the metal, these parts moving fast, the environment is poor, working temperature can reach 400 degrees C to 600 degrees C. In such a bad condition, only qualified lubricating oil can reduce the wear and prolong the service life of engine parts.

Function of oil

1, lubricating: between the piston and the cylinder, between the spindle and the bearing are rapid relative sliding, to prevent parts too rapid wear, in the two sliding surfaces between the establishment of oil film. A sufficient thickness of the oil film is separated from the surface of the relative sliding parts, thereby reducing the wear and tear.

2, cooling cooling: oil can bring the heat back to the engine oil tank and then distributed to the air to help the tank cooling engine.

3, cleaning cleaning: good oil to engine parts carbide, sludge, wear metal particles recycling back to the oil tank, by the flow of lubricating oil, rinse the parts of the face of dirt.

4, leak proof seal: oil can form between the piston ring and the piston is a sealing ring, reduce the gas leakage and prevent access to external contamination.

5, rust proof, anti-corrosion, lubrication oil can adsorption on the surface of the part to prevent the contact of water, air, acidic substances and harmful gas and parts.

6, shock absorption buffer: when the engine cylinder pressure rise sharply, the sudden increase in the piston, piston, connecting rod and crankshaft bearings on the load, the load through the bearing lubrication, so that the impact load of the buffer.

Understanding and selection of oil grade

On the outer package of the oil, we are often seen in SAE and API. Where SAE is the abbreviation of the American Automobile Engineering Association, API is short for the American Petroleum association. The SAE behind the label indicates the viscosity of the oil, while the API behind the label is marked with the quality of the oil.

10w-40 is which the viscosity of the SAE standard value and the viscosity value first said the oil is a complex grade lubricants, w represents winter winter, w in front of the numbers is on behalf of the pour point temperature, in simple terms is the freezing point temperature, the lower the number, the better. The figure at the back of the W represents the kinematic viscosity at 100, and the higher the value, the higher the viscosity.

Common oil problem

Why should the car oil winter?

The viscosity is not the same, the low temperature difference is very big. Mainly due to price factors, wide temperature oil prices high, the general use of narrow temperature oil will be divided, wide temperature is not extreme, commonly known as the four seasons oil!

The most typical 5W40 is temperate climate four seasons oil, natural environment temperature range is -30 to 40 degrees.

How do you know the oil in the car is less?

Open the engine cover a dipstick, the oil dipstick with a scale line, normal should be between the scale line, as well as in check is first on the oil dipstick clean after on re examination, because the running of the engine with oil splashing phenomenon so first take out oil foot on display is not allowed.

Car with T is not a full synthetic oil?

Due to the high operating temperature of the engine, the engine oil is easy to be modified in the course of use. The condition of various parts of the turbo engine is bad, which makes the turbine engine have special requirements for the engine oil. It is necessary to have good abrasion resistance, high temperature resistance, high oil film strength, high oil film strength, good stability and low viscosity. Oil has two important parameters of grade and viscosity.

In order to ensure that the turbine engine can run well for a long time, it is recommended to use full synthetic oil.