I have a little over 14,000 miles on this tire and it is just now into the wear bars in the middle. It probably has a few thousand miles more of safe riding so I will keep it around as an interim tire and mount a new City Grip on my spare rim. Expecting to get a Marc Parnes for Christmas.
The incredible number of miles people are reporting on the City Grip rear 150 coupled with how insanely easy it is to change the rear wheel now that I have an AK has made me want to try one. Add the pain in the ass it is to mount a 14 inch car tire on these rims and it seems to make less sense to continue with a car tire. At least for now. I will probably go back to it in the future.