Take 1 1/2 to two quarts of
oil out and then run 5000. You don't need 8 1/2 qts in there. Yes, you've got a scraper, tray and baffled chambers. I've run 7 in my same Canton in a sideoiler for 16 years.
Barring other issues we don't know about, that should stop your problem and won't hurt the engine-even in track use.