No aftermarket air filter truck is stock. I work this truck pretty hard in the heat down here, this run had about 2800 miles towing 6k trailer.
I have no plans to change oil brands at this time, I will use up my Castrol (about 3 more oci) and then switch to my Kendall stash most likely if any is left.
I will probably try 10k interval this time. One thing that surprised me is no fuel dilution, all my other EB dilute. My 2011 EB routinely had 3% IIRC