I used 20/50 Castrol GTX, along with about 1 quart of the Lucas. After that, the only time it would smoke was at races when I would be decelerating from redline or higher. You can see it in some of my videos, and its not much.
What happened was, I used the Haynes manual to find out how much oil for an oil change. The information provided was incorrect (had to look in the back section for updated information to get the correct amount), and as a result I overfilled the system. Everything was fine for a few miles, then I let off the gas to catch my off ramp and all of a sudden I couldn't see anything behind me. The entire freeway had to slow down until the smoke blew off the road.
So, in my experience, overfilling the crankcase will blow out the oil control rings in very short order.
But still, I got another good 20k miles out of her like that thanks to the Lucas...