You don’t need break in oil. Just incredibly short initial drain intervals of the oil. You don’t even need to change the filter for these first few changes.I have never gone past 5K. I wish I knew of the brake in procedure that is being recommended by members. It sounds like a good idea. Amsoil sells some brake in oil that I may consider if I ever buy another new car (or when I get my new TTV6 engine from the recall)
I did this for the first time (credit again to LSJr) on a Honda engine and the first change at 500 miles showed dark oil. Next change at 1500 was also dark. I did a third at 3k and changed the filter. I used pennzoil ultra platinum for this.
I changed my LC oil much earlier than the “recommended” 10k initially as well. Had I have it to do again, I’d mirror the intervals I did with the Honda above. Lesson learned. HTH