Originally Posted by benhen77
Personally, I'm wating until after the warranty is up to run 0w20. Kia dealers are pretty notoriously terrible about warranty claims- not that I think I'll ever need to make a claim. Yes, you can fight them and probably win, but I'm for just using whatever the manufaturer recommends and avoiding that potential conflict.
They are terrible about claims, but I doubt those dolts would be able to discern the difference between 5W and 0W-20. Mostly they deny for things like the timing belt not being changed on time, etc...