It's not a "crap and irresponsible comment".Sorry but what a crap and irresponsible comment. Tens of thousands of Hondas, Toyotas, and Fords have not had any such issue. Blaming OEM failures on a few CST's is just foolish!
And- I've seen Hyundai and Kia since their early introduction in the US market as they were popular with US military personnel as they were cheap. They often used lots of oil whether it was 5W-30 or 20W-50. It didn't' matter. I think I put more 20W-50 in an ex's Scoupe than she put gas in!

And I have never claimed there are outright engine failures by using the recommended oil viscosity - but there certainly could be more engine wear, like maybe what happens with the early oil burners - why else would an engine start burning oil way too early beside due to accelerated wear. Read what I said a few times again. I simply said that using a grade higher than the (CAFE driven) "recommended" adds engine protection headroom. That is a simple fact that you nor anyone else can prove otherwise.
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