Hello everyone, im going to be doing my first oil change in my '11 wrx right away and im unsure what brand oil to use. Obviously a full synthetic, ive heard some good things about AMSOIL (which is where i think im leaning), Rotella (T5 i think?) or of course my dealership says I should use their synthetic oil. I live in Canada and its quite cold, down to -30 C in the winter. Also i dont think AMSOIL makes filters, so i would need to choose a good full synthetic filter as well if I were to go that route. Any help on this would be great. Thx.