Had the pre-production ST for 6 months and almost 15k miles. The only issue was a bizzarre SiriusXM update the froze MFT. The miles my brother and I put on the ST were very hard with aggressive street driving, autocrosses (close to 40 total runs), open track, gravel, snow, and ice. I would doubt most would drive their car as hard as we did for 6 months. It was an "acclerated" test
The only issue I have is this intermittent creaking/ popping sound that occurs when accelerating from a complete stop and coming to a stop. Also happens when the steering is close to full lock left or right. I was suppose to take in again today but the damn noise went away... this is my 2nd attempt. It is really strange and frustrating. When the noise does go away, it is as if nothing ever happened so this just a mystery to me. Seems like I'm the only one experiencing this. Oh well, I still love my car!
I had a defective rear-wiper motor that worked about 10% of the time. It's been replaced with a new one and zero issues. The only other issue is snow and ice can get into the blower motor assembly causing in some cases no heat and the car un-drivable. However Ford has a fix for this, my car goes to the dealer tomorrow to get this fixed.
My car is due to go to another dealer to be checked for high oil consumption next week.
The other issues I've had (not sure if related to the above) was initially a exhaust camshaft position sensor was replaced which lasted 6 miles before the CEL returned and then it was in for another 5 days when I was told they performed a crankshaft adjustment.
I still love this car though. My biggest beef is the lack of information, almost secrecy, from the supplying dealer of what they actually did to the car.
Off-Topic, but could I ask another fellow ST owner to check their oil level when it has sat for 5-6 hours and let me know how different a reading you get compared to a warm engine?