What oil has zinc now?

Hi all, sorry to make some of you revisit this...:read2: after reading this entire thread I was just as confused as some of the others here. To make things simple, can one just use the "oil of choice" off the shelf at any Autozone, Napa, Advance, etc. and just add some GM EOS to help with the zinc issue?

If so, how much EOS is added per oil change?

The above seems like a simple solution to everyone's problem, get any ole' oil you want (any oil) and then swing by your local Chevrolet dealer for a bottle of EOS. No Shipping, No waiting, No worries.....

This is under the assumption the new EOS has the Zinc content we need??..Is this a good choice?