What oil for my new engine

The normal VR1 has nothing more in it than any other oil, same with Rotella now. If they have the API seal on them, or note protection of SM they dont have much Zinc. The stuff I use is labeled as not legal for street use, but that's if you have catalytic convertors. I think the 20-50 is VV851 or soemthing like that. I break in the engines on straight 30wt, and then use the 10-40 or 20-50 for use after that with flat tappets.