If I do my calculations right (!) consumption is one quart on 1500 miles. Manual says the bottom limit is one quart on 600 miles.
Engine has no leaks, exhaust has no smoke whatsoever. No sign of any restriction in the exhaust (cat). Oil pressure on gauge is max. Engine has 98000 miles.
Mechanic thinks it might be the oil rings. Fixing this will be more expensive than the car is worth.
So that's why I'm wondering what will happen if I just keep on driving and pouring....
If clogging up the cat is the only downside: I recently learned that according to the law here, cars of my age don't need cats if they meet within the required levels without one. My guess is that it does. Really