Appreciate the info, picked up a Sprint Converable with 55,000 miles on it. I see Lucas makes a Zinc additive. Would it be worthwhile to add this or something similar at every oil change. I would like to never go into this engine as the miles are so low and it doesn't burn/leak any oil.
I spoke to the owner of the engine building shop that I have used for all of my machine work for many years. He recommended using Break-In Oil from Joe Gibbs racing instead of using an additive. This has been their practice for a few years, and their customer's success rate on initial break-ins has increased dramatically. They also have a product called "Hot Rod Oil" that comes highly recommended.
I don't usually offer opinions about stuff I haven't tried, but in this case I feel very confident in their experience with it.
