I had trouble adjusting to the awd clutch, so when I was getting out of gear, I didn't have the clutch pedal all the way out until 3 grand, so i went past 4k fairly often and the only problem I've had with the car as of 11,500 was a fried clutch at 8500 miles. I have no plans on keeping this particular car until the warranty runs out because of this, though. I'll trade for another before then and break it in right, next time. I think my car was the dealership's "play car" it already had 212 miles when I bought it and I'm pretty sure the previous test-drivers took it well past 4k. But again, no problems related to the break-in period as of yet.