Because of the oil deposits in the oil tank and at the sieve, I wanted to regularly cut the LM Motor Clean Up with the oil change (<=r10,000KM), which is supposed to solve deposits. According to the operating instructions, this should be added to the engine oil and then drained after 15 minutes with the used oil. Thought now, what an effect it would be possible to achieve, if you admit it to the oil and "let it stand" for 2-3 hours. Think the oil level in the Wan Is only the farge (or rather fear), which dissolves everything at once and then allows larger particles to be clogged up during the 15 minute period (note the conjunctive). My Saab Bude was also referring to the problem with the sieve.... She would only preemptively advise against the expansion of the oil tank. Only when the start of the process would it be possible to start with the oil tank. the engine is the well-known Brumm/Pfeiffton or when the cold start the oil pressure warning lamp takes longer and longer to go out.. Only then tub from time to time new sieve in.. Greeting and Dnake for your messages, Konstantin