My Limited is an 06 but only has 25k miles on it. Been driven about 37 months. However, I've heard tires will start to rot after 3 years. The paint on the "Fortera" is a little faded and worn looking but the tread looks deep enough to keep going. Should I replace now or wait? We're taking it on a week long vacation and probably will drive a 500-600 miles each way..