I'm not sure what to go by with these cars...time or mileage. Mine is 8 years old, but only has 49k miles, and I'm pretty sure it's already ticking. I follow the maintenance schedule with regular oil changes, had no choice to change the coolant when the upper hose exploded on the highway, and have been through 3 oil filter housings. The front right strut is blown out, and I'm starting to get random misfire codes every now and then. I heard the Pentastar was a great engine, but I think mine will be limping just to make it to 60k miles.