I was speaking with my father today about cars etc. and he reminded me of a few old cars he had and their condition before he sold them. A few old Fords came to mind that my father was the original owner of. He had a 1982 Granada 200 I6 that was totaled with close to 220,000 miles on it.
It had developed a nasty valve cover gasket leak, those engines were a pleasure to work on. Changing a VC gasket was a snap. He reminded me about when we had changed that VC gasket how clean that engine was. At the time the car was around 15 years old. The valve train was spotless, with slight varnish. He always ran a pint of MMO for the last 500 or so miles of the 3000 mile OC he did on that car. It was a daily driver, stop and go traffic from L.I. to the Bronx 5 days a week. Oil wasn't as good back then, as it is now. He said he added about 1/2 qt of oil during the 3000 mile OCI, and that was the way the car was from day one. On occasion he'd run a full qt for the 3000 miles during the winter time.
The kick in the arse was the VC was changed about a week before the car was totaled. He still uses MMO today, pretty much the same way he did then.