My '87 Syncro allows oil to leak out and show up on the rear window IF I fill
it to the full mark on the dip stick.

At about 1/2 quart down from "full",  it no longer leaks.

Is there a common fix for this, or does everyone run 1/2 quart down?

Curt Long
Maple Valley, WA  (No longer in Thailand)
'87 Syncro Westy
Many other toys