EOS is obviously for added protection for break-in but would it be advantages to run as an additive all the time?

Plat,
I dont know about the latest formulation, but in GM's Chevy Power manuals from a couple of years ago they recommended NOT using it for extended periods due to the possibility of combustion chamber deposits. I dont know at what point the disadvantages outwiegh the advantages. More and more engines are using roller lifters nowdays too. Those engines do not really need that type of extreme pressure addative.

Bill Koustenis
Advanced Automotive Machine
Waldorf Md