I’ve read a lot of comments about which oil to use in the Veloster N. I did the test myself. All oils I used were 5w30. I used Royal Purple, SuperTech, and Valvoline. I haven’t heard to many good things about Mobil 1 so I stayed away. And to be completely honest. There is no difference besides price. I personally thought the Valvoline did the best with keeping the oil temp low when on the track and helping the car start when cold. I know the manual says use 0w30 but there is such a slight difference between the 2 weights it’s just not noticeable. Now of course if you live somewhere with extremely cold winters but hot summers I would personally use 5w30 in summer and 0w30 in winter just for the cold starts. So I recommend Valvoline 5w30 full synthetic oil and a K&N HP1004 oil filter. If anyone has any comments, questions, or suggestions let me know.