I have 197,000 miles on my 2008 Jeep Grand Cherokee.Change the oil regularly and just bought new set of tires. Engine sounds smooth at idle. Just drove back from CT to Aiken, SC 15 1/2 hours straight. Engine idled smooth after that long haul. Car has been good to me and I have been good to it. Want to break 200,000. Never had a car last this long.