On Thursday the car came to good use moving a bookshelf a few kilometers. Using a pair of old roof racks last used on my parents’ long ago sold Volvo 740 it was no problem getting the shelf from A to B.
The quite substantial puddle of oil gathering under the car every time I park have made me investigate the matter some more. I now believe the majority of the oil is coming from either a poor seal at the bottom of the ignition distributior or most likely a leaking cam tower oil feed line. Since neither is very expensive I’ll replace them both as soon as possible.