[Tannaton]

The manual gearboxes don't suffer the contamination of the oil from the clutch debris that the automatics do, so changing the oil isn't nearly so critical. There is far less of a risk that it will have a premature failure through dirty oil than with the autos. However if it's done 100k or more it is a good idea and you do usually notice a slight improvement in shifts.

As has been said the gearbox is so reliable it can almost be taken for granted - but check all shifts and listen for any noise.