Maybe we need to 'remind' the newer users here of an application that points to a benefit of PAO synthetic oils; namely, the 1MZ-FE Toyota engine.
Since you all have read about shearing and VI improvers, I'll just summarize that in this particular engine, there is a benefit to using (true) synthetic oil. (Also, used-oil anaylses have been nearly wear-free using Mobil 1 oil in this engine).
That's my 2 cents...
Pete