There are many thousands of opinions to be found on the internet on "the best oil" for whatever.  Myself I prefer to use what the vehicle manufacturer recommends and ignore all the technobabble and even advice from the oil company representatives who are often just reading from an application guide and know little of the subject.
  In my Australian handbook LR (the COMPANY, not the dealer) state Ford WSS-M2C-913C so that is what I use. Whether it's perfect for Australian conditions or not is not my concern, nor can I ascertain what may constitute a better product given the infinite variables and alternatives. So for peace of mind manufacturer’s spec it is, and it must state compliance on the tin.
  Finding Ford WSS-M2C-913C in Australia was the problem. Commonly known as ‘Formula F’ in Europe, Ford Australia don’t sell it. Neither did my dealer.
  I searched for months and eventually found Castrol Magnatec A5 Professional 5W-30. Note that it is A5 in Australia, not A1. I would add that even the Castrol helpdesk that I spoke to did not reveal its existence but it is out there if you know what to ask for.
So here it is, the Puma 'Holy Grail', maybe that should be 'holy oil', made specifically to meet the Ford spec. :D
  
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