Hi, already sorry in advance when there are already several threads on this topic, I am in the bottle subforum or other things… I have been dealing with the topic for some time now and have found nothing to please me at best will so far. To my problem: my moped has foam in the oil but not too much and even only with running engine. After that it is put away within a minute. Jetz is always left in forums where it can lie and that foam In the oil is a dead sin and an engine damage is imminent. But I can let out the “normal causes” such as too much oil, cooling system or too much short distance all. My cooling system was printed by the workshop and is dense, it can not be too much oil as well as short distance. After I made my oil change yesterday with oil filter and extra attention did not get in too much oil and it still foams, maybe a little less but foam is still there. a contamination in the oil it can not lie with fresh oil. I drive now certainly already 8000KM with this problem and have up to the little foam in the display glass no other faults. Can it be the foam is to a certain extent normal and I let the Internet drive me crazy? already thank you Lg