What break in oil for flat tappet cam

[B4C]

Whats the best and what should be used regularly after break in?

[WildBillyT]

I used Comp's break in oil for that part, and VR1 non-synth 10w30 for regular use. No additive needed. Valvoline has said that's it's purpose. The "not for street use" is because of emissions.