Mix first 6 ingredients. Place turkey, Brest side up, on roasting rack in shallow roasting pan. Sprinkle 1 tbsp of the spice mixture inside turkey. Stuff with celery, onion, oranges, and bay leaves. Brush turkey lightly with oil. Spread remaining spice mixture over entire surface and under skin of turkey. Add 1/2 c water to pan, cover loosely with heavy foil.
Roast in preheated 325 oven 1 hr. remove foil. Roast 2 - 21/2 hrs longer or until internal temperature reaches 165 dgs, basting occasionally with pan juices. Remove turkey from oven. Let stand 20 minutes. Transfer to serving platter. Reserve pan juices to make gravy.
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