Not to hijack the other thread. I just run Dino oil. Change it about every 3500 miles. Closing in on 200k. Uses about a 1/6 of a quart by the time to change. Oil still looks new. I know oil has changed since I was 16. I’m 52 now. My grandpa would probably crawl out the grave and slap me If he knew I went past 3000. He was a machinist and engine builder.