Hi BITOG,
I recently purchased a 2012 Hyundai Sonata Limited (2.4) with 17K miles on it. Mother-in-law special, so priced way below market value. All previous work has been done at the dealership (including all recall work performed) and it has a fresh full syn oil change done at the dealer last month with about 300 miles on it since then. They also did a transmission flush, installed a new serpentine belt, and a brake fluid flush. This car will be driven less than 10K miles per year, maybe even less than that.
I am a little familiar with these engines being picky about oil filters (I plan to use OEM because of this is), and maybe even the oil and OCI to a lesser extent. As I am the 2nd owner of this car, I do not qualify for the 10K/10yr warranty, so I want to make sure I am being sensitive to any idiosyncrasies this car may have as it will most likely be the car my younger son takes away to college (if and when he needs one) and drives after graduation.
I'm thinking an OEM oil filter and Castrol Edge 5W-30 every 5K miles or 1 year (whichever comes first) is a good safe plan for this car. Any issues with this? I'm open to suggestions if someone has a proven system with this engine.