Carl,
We have a little disagreement here in what you recommend and what I am now recommending after me spending quite a lot of tiume doing some oil and filter research.
Don't disagree about the changes in Mobil 1 though.
Remember if the oil container does not say racing oil on it don't use it with flat tappet cams.
I find this to be the opposite now. To me, it is my opinion that about the only thing that is now racing quality about what is labeled as racing oils is the price you pay. All of them have recently and also over time gone downhill. I used to believe and buy into the whole anti-foaming idea and the 100% Pure Pennsylvania crude etc. Now Valvoline, Pensoil, Castor-oil etc have removed the additives we need in performance engines from oils labeled as racing oils.
It might come back to bite me but I have recently maybe a month ago changed all my guys over to using Fleet Grade oIls of Chevron Dello 400 Multi-grade or the Shell Rotella T HD in the 15-40. NOT THE LE or LOW EMMISIONS CRAP>
Anything rated less than the 10 it begins with is getting extra solvents added as thinners. All refined oil begins at 10 w and when additives are included goes up to a 15w. .
Read the piece I wrote on SpeedTalk about this in the General Discussion section. My sources of informatuion came from an Oil Systems anylist whom is not only a chemical engineer but is listed in the Who is who, of the Society of Automotive Engineers (SAE). He also sells his own brand of racing oils, so he benefits none by telling me about the fleet oils.
Ed