Posted by MoparNorm [71.110.251.13] on Wednesday, February 16, 2011 at 23:37:49 :
In Reply to: The culprtit is the phosphorus, the 'P' in ZDDP posted by ChrisCase [63.199.242.241] on Wednesday, February 16, 2011 at 21:35:03 :
That sounds completely plausible.
Most of my rebuilds are with blueprinted high pressure springs, in both Jeeps and Dodges, I haven't heard of any issues with the flat heads. Break in of a new engine is still a concern, but normal day to day running is most likely OK with rated oil, after break-in.