Tried most 0w20 and 5W20 in the Subaru FB2.5 and 2.0. The Crosstrek, surprisingly, likes a very thin 0W20, so the Idemitsu Subaru Professional Use oil fit the bill. I have multiple UOA posted for a "2017 Subaru Crosstrek" that show much less wear metal in solution/suspension than the universal ave and this is with the OCI extended by 50-60% to ~9K miles.
I also ran Valvoline Advanced 0W20 with a top off of Magnatec 5W20. The Valvoline ran a bit sticky in the Subaru until a little Maggie went in on top, then the engine ran super smooth. Just a Casual - though professional - observation
There is no need for 0W20 in GA. A 5W20 would do fine, esp on a flat-plane crank engine. The Valvoline Advanced that you run in your Hyundai is an excellent 5w30 formulation - best out there IMHO on the Walmart shelves.; but formulations are changing.
Synthetics are not synthetic so there is no " Synthetic vs Conventional" argument to be made on PCMO anymore.
As far as Europe and Asia and So America vs. NO. America, the ECU programming on VVTi engine will vary with the
oil choice ( KV100) and in open loop where the cams can Advance and Retard many degrees, there is no precise hydraulic control other than the anticipate KV 100 viscosity range.
More viscous oil = higher line/drill pressures will equal more intake cam retard at any given rpm which will push the VE upwards in RPM possibly out of operating range and make the engine feel sluggish and have deleterious and cascading effect on other control systems like ECAT programming, EGR (if external), emission and heat loading, K sense, etc. In other words you don't want to go there on your DD except in special circumstances like High RPM ( 4500+) high load running ( Read "fast and furious" adventures)
I would just break the thing in with Motorcraft 5W20 or QS green bottle the first OCI after the FF
Absolutely no need for the best stuff to be employed right off the bat during wear in;
and keep that FF in there for ~3K miles/6mo. !
- Ken