I have been running interceptor and like it. The Dominator states it is for racing engines. I have rejetted and am on the fat side as far as spooge is concerned, but my 4 stroke buddies don't complain about smoke when tailing me. I'd recommend interceptor if you haven't done any major engine mods. I also like the detergent boast of interceptor (although I haven't had the engine apart yet(runs too good still)).
I use Amsoil Dominator 45:1 and have been very happy. At rebuild, things look pretty clean. In the past,I used Golden Spectro and Yamalube and found more carbon and goo.