What hazards will occur if you add more or less oil?

Automobile lubricating oil is known as the "blood" of the engine. Although the oil is good, it is not added casually. It is not only necessary to choose the right oil, but also to choose the right amount. Then, if the oil is added more or less, it will be harmful to the car. What kind of harm?

When the amount of oil is not enough, the crankshaft cannot touch the oil. At this time, the oil becomes a decoration. It cannot lubricate the cylinder wall and piston at all. The lack of sufficient lubrication protection will cause increased wear of auto parts. In the long run, the engine will also fail.

And add more oil, there will be harm?

01 will increase fuel consumption and affect power.

Under normal circumstances, the rotation of the crankshaft will just reach the level of the oil, so when it rotates, some oil droplets will be splashed on the connecting rod, piston and cylinder wall to lubricate these parts. They have no lubricating oil channels. It is splash lubrication. However, if the oil is added too much and the liquid level is too high, a large part of the crankshaft will be soaked in the oil, which will agitate the oil when rotating, which greatly increases the rotation resistance.

02 will accelerate the production of carbon deposits and damage some parts of the car.

Because the crankshaft is stirring the oil, a large amount of oil will be stirred onto the piston and cylinder wall and enter the combustion chamber for combustion. Engine oil contains a lot of impurities and is not suitable for burning, so there will be a lot of things that cannot be burned, forming carbon deposits and adhering to the combustion chamber. With carbon deposits, it has a long-term impact on power and fuel consumption. The combustion of engine oil will also produce a toxic gas, which will cause the three-way catalysis to fail, the oxygen sensor will be poisoned, and the performance of the car will be affected.

03 Causes oil leakage from the crankshaft oil seal and shortens the shelf life of the oil.

Because the oil is agitated a lot, the pressure in the crankcase will increase, and the pressure will act on the oil seal of the crankshaft, which will accelerate the aging and deformation of the oil seal, and eventually lead to oil leakage. It will also accelerate the oxidation and deterioration of the oil and shorten the shelf life.