hello is it possible to fight the well-known valve coke in the M271 engine in advance? I thought about the use of full-syntetics oil or valve cleaner from the company Liquy Moly you mean that brings what or is only money thrown out? I got a can from the Liquy Moly yesterday and also 10 liters 0w40 Mobil One would you fill the valve cleaner before or after the oil change in the tank? I have already 102000km on my car but nevertheless the Problem real to create and prepares me sleepless nights *g* do you think after 100000km it will rather not enter? I drive by car certainly not zimperlich, but mostly country road but since also often so on average 130kmh on the highway I come very rarely for the purpose of free blowjob! in most cases I move my car on the route to work that are: easy 20km country road for tips and experiences very grateful Gruss and good driving