X don’t really need much outside of the fluids intervals. I wouldn’t even suggest touch the trans fluid. The only thing you gotta keep an eye on are the cooling system hoses. Even if it’s not time for your oil change still get a habit of at least a bi weekly look over. Heater Core hoses, Radiator Hose will fail at some point. After 150K the X will become very verbal and visual about whatever is affecting its performance. If you’re holding on for the long term. I’d suggest sourcing your AC compressor and alternator now, have those ready. I’m near 300K on my 2011 so far I’ve had those, a radiator, sensors, heater core hose and now about to get started on suspension. I’m very confident at this point this is a million mile vehicle.