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Quote: Don't use Xw20, that's only for the normally aspirated 2.4. Yes, the manual's footnote regarding 5W20 is for the 2.4L, not the 2.0T.

I have a 2012 Sonata 2.0T and the manual recommends API Service SM, either 5W-30 or 5W-40 -- it says nothing about synthetic or otherwise. The dealer used Penzoil 10W20 (manual footnote: "for better fuel economy, it is recommended to use the engine oil of a viscosity grade SAE 5W-20 API SM")...