I'm the third owner but, it only had 40,000 miles when I bought it in late 97 and now it has 140,000 miles on it. I've seen a truck stay together this go though, I drive it pretty hard and have never had to do any engine work, the valve covers have never even been off since they were put on by Ford. I am fixing to install some RR's, cam, and lifters though so, I guess I wont be able to say that anymore.