Yep, the "break in assembly lube" get's them through the 20 minute break in, and somewhere before the 1st 1000 miles a lobe goes..... without zinc.
I use this in one Duster, from ebay ... 3 ZDDP MAXX ENGINE OIL ZDDP ADDITIVE ZINC & PHOSPHORUS | eBay
And this in another Duster, from O'reilly's.... Valvoline 822388 VR1 Racing Oil, 10W30, 6 Quart
But there are many different oils, and additives that will get the job done. Plenty of threads on this too
