I'm cetainly no chemical engineer,but here's my take on the subject;
On any new engine for brake-in I like to use a break-in additive...........
Once it is properly broken-in,then I think any good
oil for that engine application is fine.............My present company car turned 281,000+ miles today and has had nothing but Shell Rotella T 15/40 in it since day one and runs great,never had a vavle cover off or any internal work done on the motor........so the present day oils must work pretty good..........I have been using Shell Rotella T 15/40 for about 10 years now in everything I own form my riding mover to my 65 Mustang that I drive on the street and track.....................
The company car I had before this one had Castrol 10/30 in it for 250,000+ miles with no problems what-so-ever.........
I think that the major name brands are all good oils and any should be fine in your engine,if you are still unsure,just add a can of STP with every
oil change for added insurance..............
David