I worked at a dyno lab in 1994 that ran an 800 hr endurance test on a Neon 2.0L 16 valve engine for Chrysler. The test was a one hour cycle with rpms ranging from 2000 to 6000, mostly 5000 and under. The throttle was wide open at these various rpms for atleast 40 minutes of the hour. At the end of each hour, it would run 5500 for a minute and rest for a minute three times. Then it would do 6000 for 30 seconds and rest once or twice. I believe we changed the oil every 100 hrs. The oil was Mopar conventional 5w30 which was Citgo at the time. With an average rpm of 3500, that would equate to a speed of about 85 mph and 8500 mile OCI. They did not run UOA's, which kind of surprises me looking back. They just wanted to know if it would survive. One did and one didn't, but it wasn't a wear issue, it was a head gasket I believe. I used to hear this thing scream and make its 130 hp at the end of every hour, all day long. I can't remember exactly how much, but the oil consumption was pretty reasonable. After that experience, I decided the 3,000 mile OCI under normal conditions was absolutely ridiculous.
The reason I have run UOA's beyond just curiosity is to get out of superstition, emotion and hunches and get some facts. If someone wants to stay in superstition and fear, why bother getting the oil analyzed and why bother being on here?
I have never kept a car long enough to wear an engine out. Has anyone really? They ride rougher and look worse every year a lot faster than the engine wears out generally. I think I am going to run Walmart Supertech next change and go 10k just to irritate some people on here. :<)