I would recommend getting castrol magnatec 5w-30, get the 4 litres plus two one litre topups, you should really only need about 4.5 litres as the engine capacity if 5.6 but youll never get it out completely unless you remove the sump.
Ok will do!
Although I do have a Pela 6000 oil extractor pump that I use for servicing my smart fortwo (no sump drain plug, oil has to be sucked up through dip stick).
Could I use that on the focus to perhaps? Or even just to get the last bit out?