I have a different answer.
I went to an auction over the weekend, and ended up with a shitload of oil from back in the day, all in CANS not bottles. I mean the kind of cans that you need to punch the top of with a spout...... I'm pretty well set for oil from back when my 70s and 80s engines were new.....that's after last fall when I went and bought 4 cases (case now =only 6 cans.... WTF) of ZR1 to break in my /6....
