I can't verify this, since at the moment I'm feeling too lazy to go get it,
but wouldn't my owners manual provide that information? And perhaps yours
would also?
Volvo suggest that these boxes are sealed for life and no change is
necessary, however if you want it to last more than ~100,000 miles then have
the oi drained and flushed every ~20,000miles. Be aware that volvo ceased
fitting dipsticks to 2002on cars and you'll need to buy the stick from a
dealer.
