Jaguar XJ6 Rebuild

I Got Tht Jaguar And They Diagnose One Piston At 58% While The Other Ones Were Above 130. I Was Told To Run It Until It Died But Is My Wife...

Oil Going From Crnkcase To Airintake Via Hose From Filler Tube On Valve Cover...also Alot Of Condisation Build Up (foaming Tan Oil) At...