Trip to Michigan from Washington this summer discovered a very slow leak in one tire at 42 psi from the 19” recommended 49 psi.
I topped it up at Boyne City, Michigan and again at Tomah Wisconsin on way back. Had it checked at Seattle Service Center and they found a nail which was in the sidewall and could not be repaired. At this point I had just over 28,000 miles and assumed they would recommend replacing all four, but no the technician said just a waste of money as there was 2/3 remaining tread on the other three.
