Can engine oil and gear oil be mixed?


The difference between oil and gear oil is quite big, and the two cannot be mixed.

Main functions of oil: lubrication, cleaning and dispersion, cooling, sealing

Lubrication is actually the easiest to ensure, because even the most common lubricating oil has good lubricating performance. A CA6140 lathe in the 1970s has been used for nearly 50 years. The gears are in good condition, and ordinary lubricating oil has been added all the time. .

Engine combustion products require oil to dissolve and clean. Otherwise, these impurities will gradually harden at high temperatures, thereby affecting the normal operation of the engine.

An oil seal is also required between the engine piston rings and the cylinder wall to prevent blow-by.

Cooling, intense combustion has been going on in the cylinder, the temperature is very high, the cylinder wall and cylinder head have cooling water channels, which can be cooled by the coolant, and the piston cannot be directly cooled by the coolant due to its particularity, so there will be oil injection under the engine piston The oil is injected into the bottom of the piston to cool the piston.

Therefore, due to the particularity of engine work, there are more requirements for oil.

Gear oil is mainly anti-wear, lubricating

Gear oil is used in differentials and gearboxes. These places are mainly gear meshing to transmit power, and they are all located at the end of the transmission system, requiring deceleration and torque increase, so the gear transmission load is heavy, and more viscous oil is required to ensure contact. There is still lubricating oil on the surface when it is bitten vigorously.

The gear oil has a high viscosity, which ensures that the oil film on the contact surface will not be damaged under heavy load. And some vehicle gear oils are also added with graphite. The main component of the pencil lead we use is graphite. Graphite is also a lubricant. Adding it to the gear oil can increase the wear resistance. In order to increase the anti-wear gear oil is often added with other substances, so most of the gear oil smells a pungent odor.

Gear oil and engine oil have completely different properties and functions, so they cannot be mixed. However, it is usually better to use gear oil to lubricate the chain than oil.

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