I run Mobil1 Full Syn 5W30 and a Mobil 1 M1-210 oil filter all year round.
I've always used Mobil 1 in all my past Mustangs, and have used all the oil filters out there... K&N Gold, Fram, Purolator, Mobil 1, Motorcraft, etc... To me they all get the job done IMO.