What's the best oils for tappet cam engines?

Abodybomber said

Interesting side note.My 408 died,breaking in a Comp solid(294s). The cam survived. I used the Lucas break in additive,with the VR-1 . The cam sits in my toolbox. Everything bare metal around it ,has surface rust. The cam has none.Something to think about.....

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Some oil and additives are incompatible. Sometimes the addition of an additive will actually lessen the oils "anti friction" abilities. Sometimes substantially. This is why I recommend the use of the proper oil for the job. As you found out high ZDDP levels can cause rust. :wack: