Anyone running catalytic converters on car with flat tappet cam?

Flat tappet and cats? My DD Jeep 4.0 has 3 cats, 160,000+ miles, a flat tappet cam and no problems. I have run Mobil 1 TDT (turbodiesel truck) 5w-40 for the last 130,000 of those miles. I change it every 10-12K.

If the engine doesn't burn or pass any significant amount of oil, there is no zinc getting into the cat. If an engine does use oil, the oil alone will ruin the cat before the zinc.