Did this at 600 miles on a rebuilt 225 Slant Six back in 88. 1000 on a 99 Cavalier and 1300 miles on the 05 ION I still have.The early oil change is to get rid of the stuff from the initial break in period wear which supposedly is much greater than normal engine wear.
We had a '13 300 that got both heads under warranty, and it was well on its way to needing another two when we disposed of itPentastar and a revision for 2017 I know. The heads we redesigned for MY13 and all 11-13s got a 10 Year 150k miles warranty one the left side head. My misfire was the right side closest to the firewall