No offense, but do you pay attention to your oil when you change it. I try to get it at 3k, but dont start sweeting it till around 3.5k, and even then running castrol I dont see much difference in color at least. Never done an analysis but there seems to be no major difference to me. But again, Im not an expert. Try it for a cylce or two and see how the car reacts and what you think, then make your own judgement from there. Thats what I have done in the past with trying oils. Not the most scientific, but its what I do and go by.
"2007 WRX- PPG'd, 20G- Tim Bailey tuned
Stage 2 2005 WRX