Mine came one after about 2300 miles. My wife's Aspen does it around 2700. I have heard that Chrysler does not have a sensor that checks the oil, rather an algorythm that basically counts RPM's (more to it than that, but you get the idea). I use Mobil 1 and will go around 5.5 to 6k (manual says 6), I just reset it and go. Anyone else?