I certainly realize I am in the minority but I have always used Amsoil for everything. My father used it in his P-51 when I was a kid (think the product was called AVOIL). That engine was a beast so I am a bit biased. Obviously, Rotella is highly recommended. Know many guys who use it with great success, so you can't go wrong with that. I just have always used Amsoil and never had a problem, so IMO why switch? Guess I like being a little different too. That's my .02
R