I have the 2014 MKZ that came with the factory Michelin Primacy MXM-4 19" tires. At 39,900 miles they are toast. 2/32s" at the wear bars. I took the car in for balance and rotation due to excessive road noise and got this bad news...especially bad since the lease is up in May (and I'm turning the car in to the dealer). IMO, the 14 MKZ fell way short of being an actual luxury car. Too much cheap plastic inside the cabin and sheet metal that dings if you look at it sideways. Obviously, production and engineering for a $40K+ car needs to come back to the US from Mexico.
I'm having the local tire store put on BFG G-Force Comp-2 A/S 19s as they are the least expensive tires that are acceptable under the lease requirements. Reviews are good aside from reports of excessive road noise - which I will endure for 5 months to save a few hundred dollars.
From the myriad of complaints on the factory installed Michelins' I've found online, very few have made it the 55,000 miles the tires are warranted for. I will be filing a claim with Michelin to recoup a few dollars. With this experience with Michelin, I may never buy them again.
My 57 cents for what it's worth.