Matt:

** and I think I need to go back to mineral oil.**

What do you expect to happen when you go back to mineral oil and why?

Again:

**If you switched to multigrade too soon
(before oil consumption stabilized) the break-in process stops.**

Anyone having ANY data to support that statement, PLEASE post it.  There is absolutely no science to support that statement.  How are cylinders broken in on a routine basis using AD oil if that were true?

Using high MP and low RPMs when ROP is an ill-conceived idea.  I posted a lengthly response as to the science of why that's a bad idea.

Walter