Maybe
Redline 5w30 at 350 miles:
Sounds better but you still aint where you were. My truck was worse then Corey's, and now butter smooth, smoother then Corey's ever was. I took a little hit going to 10w30 redline, seams like 5w30 redline is going to be as good as it gets to fight that tick. I have a feeling every tick is different, lesser ticks will benefit from viscosity, greater ticks will benefit from all parts of the formula that help high pressure, IE moly, and the base oil.
Oddly enough the oil that Corey elected to use doesn't answer the question, as it is now a low visc oil. So Amsoil SS 5w30 set you back to zero, if you get it back to where it was, I think we will have a better understanding if it was the moly or base oil, yeah? If you get it back over the next 500 miles, kinda leads me to believe it was the moly. If it was the base oil, perhaps it would have already came back. Moly needs time and pressure to plate, I don't know that the base oil needs time to repopulate that film. Either I guess is still possible, trying to nail it down will benefit future hemi owners. If we can isolate that it is moly, better outlook and more options. If it is the base oil, then only one brand and it's clones will continue to be the answer for hemi tick.
Now the forum sees what about 20 plus members who are off in the weeds already know.