I have a 2014 CX-5 2.5L SkyActive and just got back a UOA from Blackstone Labs that shows 681 ppm potassium, 267 ppm sodium, and 0.53% antifreeze. I had not had a UOA run in a couple of years, but decided to do so because I recently passed 100,000 miles.
I am also meticulous about maintenance...