Here is another suggestion: Motorcraft Blend GS-5 SN (5w20 or 5w30). Its just about as cheap ($14 for 5 qts.) as PYB at WallyWorld....and it has had great reports from many BITOG'ers.
Should be able to do 6000K OCI's easily....and used with a Puro Classic or PureOne filter....should make a great combination.
2003 Ford Focus (2.3L Duratec) / 93K
Mobil 5W20EP / OCI: 10K +/- or 1 year
Filter: Mobil 1EP 102