So far I have tried GC 0w30, and 5qts of Mobil-1 10w30 with 1 qt of Redline 5w30.
With the GC the knocking was louder and knocked even when engine was warm.
Had oil analysis done with both. Mobil-1 was slightly better.
I am thinking about trying Castrol Start-Up 5w30 next.
Your suggestions are...