worn

2009 Hyundai Genesis 3.8 was told by my dealership that the valve seals are worn on my vehicle. If they are worn out, would they affect the compression on a cylinder leak test and would I see oil burning through my exhaust? OBD code P0305 showing (Cylinder 5 Misfire). No oil burning visible...

Had Genesis 4.6 with 14K miles at dealer today for slow leak in rear tire. Was told that all four tires (Dunlop) needed replacement and were heavily worn on the inside. They felt that alignment might be the cause (no noticible pulling). They rotated the tires at 10K but did not note anything...