Nothing is better or worse. Its for you to decide on 'marketing' for whatever spec you want for you HyundaiKia product. There is no best oil.
Weather permitting, I'd go as thick as possible. Maybe consider a 5w30 synthetic and go from there.
The higher GDI PSI will reduce soot buildup. I didn't know that Hyundai stepped up to 350bar already. And, GDI pressure doesn't determine compression ratio.
I would not exceed the recommend oil and filter change interval no matter how fancy the oil marketing is.
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