Those Jeep engines are pretty tough and simple as well. Should be a goal to design engines like that, but instead we get them as complex as humanly possible it seems.


Some videos that point more towards machining errors being the cause rather than oils, or oil additives.

https://youtu.be/e96szd_HbwE?si=7X6jbY7H09uzzwI-

https://youtu.be/pP_GYZWcpok?si=5X94dRnJM2jYqwZ

https://www.youtube.com/watch?v=AgMYbNX2DMY

https://youtu.be/LJPnCA8N-P8?si=u_nsCPuIvZzAuQrQ

https://youtu.be/UPvF4FgJYlk?si=BEnGvqDZnYH5HMyU

Powell Machine and MyVintageIron7512 on Youtube have several good videos on this machine and metallurgy of cams and lifters as well.