Hi everyone, I just got a 2008 Infiniti G35xs handed down to me by my father in law and it has about 150k miles on it. The only concern about the car is that he’s never done a transmission fluid change. I’ve started driving it and it has no problems in shifting gears and power is very smooth, but I’m wondering… is it wise to change it now (I will not be doing a flush)… or not to change.