Quote:
Originally Posted by Daves55Sedan
There's no doubt that todays oil is refined much better than the near-crude of the '50's. In 1973, I took the rocker arm covers off my 272 and the oil was caked in there so bad you couldn't really see anything in there, just a big blob of gook. And that car sat in a barn all through the '60's.
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Interesting test here:
https://www.youtube.com/watch?v=-zHlxeu_yuM&t=617s what may be surprising is the chemical analysis the ZDDP we want for older engines with flat tappet cams iusn't as good as we thought.