Did they say why the Non-Detergent oil?
I have pulled down engines run on non-detergent oil and anything that wore off any moving parts was still right there in the oil pan.
If it was me, I would break it in on Kohler, Briggs, or Kawasaki 30 wt. oil. (with the detergent in it.) But since it is you, break it in on whatever oil you plan to run in it.
Run it like you are going to use it. Baby it too much and it has a propensity to be an oil hog.
Change the break-in oil at about 5 hrs. Then the manufacturer"s specified interval after that.