Scotty, i have a 2018 Ecoboost Mustang, as a daily driver, first car of my own, and first car i need to maintain. I drove it all winter in Toronto Canada, not as much snow as further north, but i did drive it home from work in a 30cm blizzard one night, lol, fun, but without issue. But now since its warmer, and i had my second service, I notice my rear break pads are worn. I went in to my Ford dealership in October at about 8000km for an oil change/inspection, all 4 brakes were at 10mm, i went in at about 13000km, in March, and my 2 front brakes are at 9mm, while my rears are both at 6mm. On Sunday my brother in law changed my snow tires to my factory all season tires, as the temps have been on the rise. though he didn't measure them, but he said the rear pads need to be changed soon. Now i (thought) i was going easy on the brakes, i definitely wasn't tearing up the streets in the snow lol, but i was reading something about traction control can do this with the current Mustangs, that its the adjustments that the traction control can make can wear out the rear pads sooner, which i can understand, if it kept my car in a straight line, and kept me from wrapping around a pole with the RWD lol. There are no other issues with the brake system, id imagine if there were, the dealership would have been on me to replace this and that, and that too... but no. Any truth to that? They are standard Ford brakes, no fancy Brembo's or anything. The photo is of her in the height of winter, she is much less salty right now lol
City driving reaks havock on brake systems, doing donuts and burnouts are also hard on the brake system as well. Naturally the backs are going to wear faster for a rwd sports car
Sounds like you have some life left on the brakes.
Dealerships and chain auto repair shops will try to sell you on everything. Don't become a victim. Find a mechanic you can trust or do the brakes yourself.
Also, she is mostly a city driver, i know that will wear things out allot more then highway driving.