I had a 2014 pre-production ST that was driven for 6 months and 20,000 miles of pretty hard use. Lots of autocrosses, track days, road trips, some off-road excursions, and general hooning. The only time the car was taken in for service was for killing a set of tires in the first 2 weeks of having the car, oil changes, and getting snow tires installed. I now own a 2015 Fiesta ST that has really seen most of it's life in the winter and no problems either.