I need to escalate my situation to the dealer. This is not acceptable on the Interstate. It was 232 before I took a picture. I am on Amsoil OE 0w20 and nervous. Haven't switched to 0w40 SS yet.
Something must be wrong in the coolant system.
Since you are unable to change the oil yourself, I recommend an oil that can serve you for 10,000 miles safely. Amsoil Signature Series 5w30 or 0w30. 5w30 will be a better choice though. I think the higher spread of viscosity you go, the higher the chance of the oil giving up. Otherwise, I would...
16 iron is unacceptable for 2k miles on a 19k truck. I have seen much better results right on this forum, as low as 7 iron on 2k mile run. I'd switch ro another oil if I were you. Try Amsoil SS 0w30 next or Redline 5w30