I'm almost at 175,000 and its definitely NOT ready for a rebuild yet. I change the oil every 3000 miles, have it serviced by the dealer according to the manual's recommendations, and drive it extremely easy. I put on almost 800 miles a week, all highway driving. I never take the rev's over 3000. The engine has everything original except for spark plugs. I fully intend to get 250,000 out of this car before I trade it off.