| Some trucks will do that. The MACH's are notorious for being black before they get out the shop door. All oil does turn darker in color in time and may not indicate that's it's necessarily dirty. Only way to know is to take a sample and send it in for analysis. With good filtration, it shouldn't be a worry. Since the vehicle was new to you, an engine flush might not be a bad idea, but not always necessary. You don't have many miles.
AMSOIL would offer some advantage as it has good dispersant additives to suspend those soot particles IF they are accumulating quickly on you. Helps to delay varnish and sluge formation.
Good luck,
Heath |