First thing I did after buying my 2000 Boxster last week was to change the oil and the filter. I just got around to cutting up the old filter and having a look at it.
My magnet found a few thread like metal shavings, nothing else that I could see.
Other than that there were little specs of aluminum throughout the filter, this is a typical section.
On another board I read a contribution that said that engines "shed metal all there lives". So is this normal shedding or something bad?