The O-rings between the oil pan and block that feeds oil to the head fail with age. It may also be the oil pump seals failing as well.

Good Luck!

Neil.

I am trying to remember if they are standard o rings or if the have a special profile

You want the right parts here as this is critical engine function. Skip the additives and stop leaks, that won’t help here.

Cold oil is thick and that pressure doesn’t seem out of line. An air cooled VW with a puny oil pump will run 50-60 psi at cold start.

No worries. Are you running a 10-30 or 10-40 oil?