Does BMW automatically remind you if you add too much oil?

1, reducing power and producing carbon deposit.

Too much oil will increase the resistance of the engine crankshaft and reduce the output power of the engine. Moreover, part of the engine oil will enter the combustion chamber, and the engine will burn engine oil and emit blue smoke, which will increase fuel consumption. After the engine oil burns, there will be residues, the main component of which is hard carbon, which will accumulate on the piston.

2. Destroy the compression ratio and reduce the service life.

Carbon deposition on the piston will reduce the compression ratio of the engine, accelerate the wear of the cylinder and piston, and reduce the service life of the engine.

3. Oil leakage caused by oil seal damage.

If the oil is filled too much, the oil pressure inside the engine will increase, and oil leakage will occur in some places where oil seals are used, especially the crankshaft oil seal and valve cover.

Basic precautions for maintenance:

First, gasoline. Pay attention to let it soak in gasoline to dissipate heat. In addition, low oil content will also affect the oxygen sensor of the exhaust system. These parts are not cheap, don't go beyond the bottom line to refuel.

Second, engine oil. Generally speaking, the oil consumption is not serious enough to pass the maintenance interval, but in summer, due to the hot weather, the oil consumption will be higher than usual. If impurities or gasoline smell are found in the engine oil during daily inspection, and the smoke is light blue, it means that there is something wrong with the engine and the parts may be abnormally worn, so go to the manufacturer for repair.

Third, transmission oil. You can check your gearbox oil when changing the oil. Because the inspection process is complicated, you can find the service department of the dealer to handle it. In order to measure accurately, the car must be put into neutral P and run at idle speed, the car must be parked in a flat place, and the engine oil must run to the working temperature of 80℃~93℃.

Baidu Encyclopedia-Engine Oil?