1Adjust oven rack to middle position. Heat oven to 425°F. Line 13x9-inch pan with foil.
2In small bowl, mix syrup, vinegar, thyme, 1/2 teaspoon salt and the garlic.
3Starting on one side of each chicken, slowly work your fingers under the skin. You are trying to loosen the connection between the skin and meat, not remove the skin. Place chicken, skin sides up, in foil-lined pan. For each chicken piece, use a spoon to drizzle about 2 tablespoons of the syrup mixture under the skin and spread evenly over the meat. Dot each with 1 tablespoon of the butter pieces. Evenly replace any skin you may have displaced. Rub skin with oil, then sprinkle with 1/2 teaspoon salt and the pepper.
4Roast chicken uncovered 30 to 35 minutes or until juice of chicken is no longer pink when thickest part is cut to bone (180°F). Remove from oven and allow to rest 5 minutes before serving to let juices reabsorb.