Heed GT Jets warning, TOO MUCH, can be bad!! There is also a brand of oil out there they are calling "hot rod oil" basically an original ZINC added 10W30 or 40 wt. oil, like they used to sell, but with a $7.00 price. Also like GT said, a low cost oil, with a ZDDP, or "break in" additive is fine. After your break in time 20-30 minutes, you'll want to drain it and add fresh oil and a new filter anyways, so buying that high dollar stuff is only used for about half an hour.
I also encourage to CONTINUE to add the ZDDP additive in your future oil changes, with a decent quality oil. Because your motor is STILL a flat tappet needing some Zinc, even after it's broken in. Some say you don't have too, but a $6.00 bottle is good insurance against a flat cam lobe or 3.
