Hyundai / Kia allow 5W20 , 5W30 and 10W30 and OCI of 3,750 OR 7,500 depending on severe service OR not . I use 5W30 synthetic because of fuel dilution issues and run a 5,000 mile OCI so as to split the difference between severe / non - severe service interval. All in all , I believe my oil plan to be sound for Hyundai / Kia DI engines .
Originally Posted By: MParr
Danno
Sure 5w20 is printed on the cap but, fuel dilution is common with the Hyundai/KIA engines. When I smelled gasoline in my drained oil, I went to 5W30. 3,750 mile OCI is for severe and 7,500 normal. I do 5,000 with an OE filter. A good synthetic blend is also fine for 5,000 OCI. My KIA does well on Motorcraft Synthetic Blend 5W30. The Hyundai dealership uses QS 5W30 blend as their fill.