So they figured out what the heck was wrong with the car. Defective spark plug wires. The ones they had just installed.
Whoops. That's fixed now.
The oil leak is smaller than I thought. It might be a case of - that leaks a quart every eight months, in which case I'm not spending $$$ to make it stop. As Walter says, "It isn't blood."
We still have the power loss phenomena. The trusty mechanic says, "It could be the catalytic converter." "How much are those?", I say. "About $300."