I remember reading here that PPPP 10W-30 is one of the most stable oils on the market due to GTL formulation and few VII. Matter of fact, as many here know, the last published NOACK for PPPP 10W-30 was 4.7% - better, in fact, than PUP 10W-30.
That's why it's my choice in my TGDI WRX. Stability under hot conditions (turbo), shear (boxer engine) and fuel dilution (GDI) should mean fewer intake tract deposits.