Preheat oven to 400 degrees. Place turkey in roasting pan. Lift skin above body cavity and insert butter slices. Rub oil all over skin on body of bird. Sprinkle with seasonings. Cover the top of the turkey with aluminum foil. Wrap the overlapping foil around the top of the roasting pan. Cover with lid also, if available. Reduce heat to 350 degrees and figure amount of cooking time at 20 minutes per pound. Remove foil during last 20 minutes of cooking to allow skin to brown. Makes 1 turkey.