OK. I just learned something, so thanks for that.
QX50 thinks it is very smart. Therefore, since its smarter than you, it decides when you need to change the oil. You're correct that it defaults to 7500 miles, but that interval can/will change based on how you drive the car. I'm guessing it can only shrink, not grow, but it does shrink for sure.
So there you go, stupid human. Bow to your tech car overlords. :laugh: