Hey guys, I am just wondering what maintenance is necessary for this model 2.7T?

I do my regular oil change, but @ 175000km, whats necessary to keep the car running properly and keep the HP's?

And second, I have a small concern about the transmission. When I start the vehicle in the morning and start driving after 30 seconds or 1 minute, the transmission doesnt shift from 1 to 2 for while. After driving it for 1-2 minutes, then the tranny shifts properly and smoothly. Would you guys know why?