Engine oil leakage is really not a patent of BMW. Almost every European car brand has this problem. For example: Volkswagen, Mercedes-Benz and even Ferrari and Maserati. BMW generally has this problem because the air intake workmanship of a car's engine is not very good, but the technological content is still very high, because the current human technological technology can only reach this level, and then it will affect the performance. Secondly, the problem of too high turbo pressure is similar to that of Honda Civic L15 series engines. If the turbo pressure of an engine is too high, the sealing ring will not seal well, and the components will age quickly. There may be several problems. The month may be half a year, especially in the Nordic region and Russia, which basically needs to be replaced every two to three months.
Moreover, excessive turbocharging can also cause piston rings to burst, overheat and age, the cylinder head to overheat, and the oil pump to overheat. Of course, most BMW models have common water pump damage.
In fact, this situation occurs in all German cars, including the currently popular Honda engine throttle. This is because the turbocharger pressure is too large and the intervention time is too close. This is normal. , all turbochargers have this reaction.
If a German car does not leak oil, it is not a normal German car. Of course, when you buy a BMW 3 Series in the future, especially the dual-clutch generation BMW 3 Series, as well as BMW performance cars, you must pay attention to whether the engine is clean. If it is too clean, don’t buy it. This shows that the original owner is a professional. The owner of the car is someone who likes to modify and squeeze the car, or the original owner doesn't like to maintain the part. Basically, the engine needs to be cleaned every six months to keep it so clean.
In a word, this is not a big problem.