Hey, welcome to the forums!
Engine oil is a personal thing to which there is much debate as to which brand/type is the "best!"
I have tried many different kinds of oils from: regular Castrol, Mobil, Pennzoil, Napa, Dollar store oil, Semi-Synthetic Castrol, hi-mileage oils, Full synthetic Castrol, Mobil 1 Syn, Royal Purple Syn, and Red-Line Synthetics. The list can go on and on.
My personal opinion (and what I always use now) is the following:
Shaeffer Super 7000 10W30 and a Ford FL1A oil filter (although I prefer the K&N filters.)
Schaeffer lubricants are based out of St.Louis, MO., and are infamous on the drag strip, dirt tracks, as well the roads I burn up in Little Rock!
Also, your car takes 5 nice quarts!
Enjoy that nice 289!