Combine all ingredients except pork in non reactive bowl and blend well. Pour marinade over pork loin and marinate in glass baking dish 4 to 6 hours or overnight in refrigerator.
Place pork loin on center of cooking grate. Cook 1 1/2 hours or until meat thermometer reads 160 degrees. Turn meat occasionally to prevent over browning. Remove from grill and let rest 10 minutes before carving. Makes 8 to 12 servings.