'14 Focus has Pennzoil Ultra 5W-30, put in right before they discontinued it. :-( Currently in search of a new, low-NOACK oil.
'12 Camaro gets Mobil 1 5W-30. Currently in search of a lower NOACK, DEXOS-approved oil.
'05 Sport Trac gets Pennzoil Platinum 5W-30
Not sure I have a favorite, as none of the above have ever failed me.