what oil to use

On another note ...

I think that I had mentioned (I can't remember for sure, so I certainly can't expect anyone else to either ;-) that I put Rotella-T in my engine, on previous recommendation from others - only to be told that Rotella-T has been changed from CI-4 to CJ-4, thus lowering the ZDDT content and making it less desirable than previously.

Well I forgot to mention that I went and checked the container and it certainly is still CI-4!

Is this just an old container from an old batch?

Just in Advance Auto Parts yesterday picking up oil for my Concorde and noticed they had a good stock of Rotella-T ... and it's all CI-4. ~ $2/qt at that.