The OP asked if a Video claim regarding current off the shelf motor oil was true. Specifically if all 2017 oil sold will wipe out cams of "our classic car camshafts." We gave an answer and the link has a paper (pdf) that explains why. The details are about the characteristics of lubrication in an engine. It even discusses different needs of gear driven vs. chain driven. For the purpose of understanding how and why an oil made and sold in 2017 differs from the ones made and sold in 1968 and 1971 it doesn't matter if the cam was made by GM or Chrysler or Triumph.