Had the engine removed for a rear seal job and valvetrain noise. Ended up with new lifters (some were faulty), new valves (tips were mushroomed) new pushrods, and on breakin had cam failure (had left in the prior cam, which many I find would advise against (me too, now). The failure occurred with Shell Rotella T 15W-40, which supposedly has sufficient ZDDP, an issue I was aware of before the 1st try. Most don't suspect the oil as the culprit in cam wipeout, so it's still a candidate IMO.
Nonetheless, on restart with a new cam and new lifters, I went with Joe Gibbs breakin oil BR1. After about another 1 hour of driving, I changed to the Joe Gibbs HR1 10W30 synsthetic (there's also a non-synthetic). The HR oils are for street cars w/o catalytic converters, include correct mount of ZDDP for flat tappets, and are not the same as his oils designed for full bore racing. I presume form looking around that both are very good for each application. Lots of info on his site.