Hillmuth Certified Automotive is running a Facebook contest for its Gaithersburg, MD location. The contest is as follows: Now, through 11:59pm on 8/19/18 enter for a chance to win a FREE 5-pack of Oil Changes at Hillmuth Auto Care of Gaithersburg. To enter, participants must “like” the Hillmuth Auto Care of Gaithersburg Facebook page and comment on one of the original Facebook contest posts saying they “liked” the Facebook page. A second entry to the contest can be acquired i