I have almost 120k miles on my 15 now, running factory 20", first owner, located tri-state.
Ever since I got the car, engine oil (Mobile 1) changed every 5000 miles, transmission oil (OEM) changed, and differential oil changed every 25000-30000 miles.
Replaced 3 sets of brake pad, Running my third set of tires, OEM 20" tires suck, only last about 20k miles, second sets are Pirelli Scorpio, just OK. Then current set Michellin, amazing.
Replace my battery near 60k miles (you will notice it's coming, the car will idle 100-200 rpm higher, then a few days later, it's dead).
Replaced drive belt around 40K miles.
Replaced front end-link at 60k miles, and suspension shocks at 90K miles.
The first problem was the transmission jerking issue, went back to the dealership multiple times, by the time my car hits near 50k-ish miles(almost the end of the warranty), the %$#king dealership finally replaced the part for me. After that it's smooth. Yes, Ac fan started to make noise near 50K miles, brought back to the dealership, they ONLY replaced the fan blade for me. By the time 80k miles, the fan failed, you will know when it's coming. Your car temperature will not stay steady. AC not cold, and ended up overheating, not letting you start up the car. I experienced it during the summer.
So I replaced a factory fan (around $500-600 as I remember), plus labor total around $1000ish. My mechanic said whenever you wash your car, try to pop the hood, and rinse the gap between the radiator, and fan. There is a lot of dust, dirt, and etc blocking the airflow.
And now, I need to replace my front axles, whenever going through rough roads, the ride is really bad.
Overall, so far so good.