Depends how much u get of ur old oil u get out. Once empty from the pan,there is still some oil in the oil filter housing! I got one of those oil sypher suckers of ebay,with that being done throw 3 n half litres down,use dip stick to see where ur at.
Once u think ur there,go for a 10min drive,then check again,top up as rrquired
Well for the v6 that is the correct spec, but my older TDi also runs fine on it, and I change to every 5K miles.