Monty,
I won't respond the oil choice issue because that is usually a controversial 'faith' issue :-).
I am doing an M96 rebuild now and also found chain ramp particles like yours in the sump -and elsewhere ! I would be concerned they could bypass the OEM oil filter and plug an oilway. There are some vital but very tiny oil ways in the M96 .The OEM filter
does not filter 100% of the oil all the time.
I suggest you ask for opinions about fitting the LN Filter adapter even if you are going to replace the chain ramps. It does filter the oil 1005 of the time.
Porsche Boxster (1997-2004) - Oil Circulation - Page 1
LN Part #: 10-0237-008