The specs on the Mobil 1 AFE 0W-30 don't look half bad. It's decently priced, and indeed API SP, as
@kschachn said. I wonder if it's even worth looking for Euro LX 0W-30. I just checked Pennzoil's website, and LX 0W-30 is gone from there. I wonder if they canceled it. If you stray from 0W-30, going by "stickler logic," it doesn't matter if you use 5W-30, 10W-30, 0W-40, or 5W-40. In the eyes of KIA, you still used something "off the menu." If you ask a Hyundai/KIA tech, they will tell you that for a turbo-charged engine, use something that ends in 40. You only need to check the Kia/Hyundai forums to confirm what I'm saying. That Quaker State Euro 5W-40 looks like a great oil as well, no idea where I can get it. I'd like to run it in my wife's Santa Fe SE. That 3.3L can run oils up to 20W-50, according to the international owner's manual, and up to 5W-40 according to the US owner's manual. The 2020 Sonata can run anything from 0W-20 up to 10W-30 and oils down to, I believe, API SL / ACEA A3. Then for 2021, they changed it, and now they are sticklers for 0W-20 API SN Plus/SP. Use common sense, even ask your dealer if you're covered if you use a different oil as long as you have receipts and proof, and use whatever you think gives you the best protection. You really only have two choices here: either use Mobil 1 AFE 0W-30 to stick to the "official" recommendation or get whatever you want and hope that it will work out. However, keep in mind that they have to prove that poor lubrication is the culprit for engine failure if you use a different oil. Considering that all the oils are good, even 10W-30, as long as you change it on time, that will never become an issue. So I don't see how they could deny you warranty coverage.