Shell Helix Ultra pro AF 5W30 is speced for this application.
From the TDS:
Main Application: Shell Helix Ultra AF 5W30 for petrol and diesel engines is approved against the technically challenging in-house Ford engine oil specification WSS-M2C-913 D.
Have used lots of Helix ultra products and can't rate them highly enough. Haven't used this one, as I'm required to use A3/B3 + C2/3 specs in my vehicles. I personally like their vertical intergeneration where Shell are large enough to produce their own base oils (GTL in this case) and their own additives. Unlike boutique blenders who rely on 3rd party base oil and additive suppliers. For example Nulon and Penrite both buy their base oils on the open market from Singapore (their words not mine) from various suppliers, price and availability dependant. Could be Mobil today, BP tomorrow and Petronas the next, you just don't know (obviously it all still cuts the mustard, but the consistancy cannot be confirmed. Shell Ultra always and only comes from the Pearl GTL plant. Single point supply.
Ford specs are a bit all over the place (which is unfortunate.) Shell don't claim an API rating, just the ACEA A5/B5, ford, landrover and Jag specs. Also note the Australian site is out of date and only claims WSS-M2C913-C. The actual bottles are labelled correctly on the shelf.
If you're in Perth you can find the best prices here:
http://www.oilandenergy.com.au/ or Repco has it on the shelf in most locations @~$80 for 5L, but they often have 30% sales.
Sorry for sounding a bit like a Royal Dutch Shell employee (I'm not.) Just a fan of their product stack and a punter who has seen measurable improvements in fuel economy and oil consumption since making the switch.
Regards
Jordan