If it's due a service soon, why waste oil by topping up to max? The car can quite happily get along with anything between min and max. When I gave my R a "running in" oil change (primarily because I ran it in quite hard and diesel is a natural lubricant in its own right whereas petrol is not), I only topped it up to the midway and saved 1/2 a litre of oil for top-ups if needed.