I have a spare one to play with, but the interwebs say its a cyclone inside not some sort of steel wool mesh that I had imagined it being. That makes my idea of it being the culprit less plausible.
I have to make this same 1000 mile trip in this car next month so I am gonna do something to see if I can change the consumption.
Its not likely I will get around to valve seals this month, so it may just be adding marvel mystery oil to see if its oil control rings.
This motor did sit for at least a decade, so valve seals and sticky rings both seem possible.

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1985 300 TD 448K
1984 300 TD 278K

1983 240D euro 240k
1994 f-250 idi turbo 330K
1986 f-350 IDI
1987 F-350 IDI

1985 JD 1050 4wd
1965 IH 3660