Why oh why. Sudden oil pressure drop.

Glad you found the problem. I doubt the engine is damaged. They did a test here years ago, removing the oil from a 6 cyl engine that had used that Slick oil treatment. It was driven about 400m, no oil, before the engine finally blew.

I never liked those Milodon/Moroso mickey mouse pick ups. The p/up shape looks all wrong for collecting the oil to smoothly enter the tube. Factory shape was done for a resason.