Back in 1972 I bought a 1969 Ford 1 ton Super van with a 302. It had 80,000 on it when I bought it. I was working as a mechanic back then and I changed my oil every 3,000-5,000 miles. I sold it when it hit 150,000 and then ran into it a few years later and it had 450,000 miles on it with nothing more than oil changes…