BigTonyTones
Member
Usually transmission fluid is not changed for a very very long time. Our old BMW had 80k miles on it and the mechanic recommended not even changing it as it might actually damage the transmission because it was too clean (so he says).A quart and a half of fluid with that much shear action seems like it should be changed every few years. Next time I talk to service I will ask if my P85 has ever had it changed and consider sampling the oil myself or have them take a sample when changing it.
I suspect Tesla recommends it to clear out any manufacturing metals. If you look at their service timeline, it never comes up again.