Engine oil

[80BrownK10]

I use the rotella t4 15w40 because it still contains zddp which a flat tappet cam needs to keep from going flat they phased it out of most motor oils a few years back and I went into panic mode.So I researched it and found the rotella still has zddp.irrelevant if you have a roller cam but flat tappet, whatever oil you run make sure it has zddp or add zddp.

Other oils still have zinc in them just not the level of rotella or other oils. If you still can get the CJ rated oils you can bet they probably have more than CK oils