[05XC90]

Going to get my 05 XC90 D5 serviced shortly.
141K on it. I've been told gearbox is sealed, but that changing it is a wise option!

-What is the best engine oil and gear oil to go for?
-Is there any specific way to change gear oil?

I've a relative who's a mechanic and he'll be doing the work on a proper lift etc.

Cheers