That pretty much answers my question, thanks, no break-in.
As for my reason for switching from Mobil 1 to Amsoil (and I have done a lot of research on this), I find the Amsoil (series 2000) to be MUCH superior (all be it more expensive). The regular Amsoil 7500 mile oil is comprable to the Mobil 1. The Series 2000 is truely in a league of it's own, look at the data sheets.
I had a 1992 Volvo 944 turbo that ran Amsoil for close to 9 years with out a single engine / turbo problem, period. Now my 2001 2.4T is running it and this new car, to be driven by my wife (about 10000 miles / yr) will be getting it as well.