[Braudham]

Hi All,

Been a long time follower of the site and have learned a lot here over the years. Currently, have a 2022 230i and just changed the spark plugs and coils at 50k miles. Noticed oil on one of the spark plug threads. No oil on the coil or in the spark plug cylinder, just on the threads and only one spark plug. At the 50k mile mark, is it more likely the spark plug tube seal or the piston ring?