Automakers are increasingly using social networking sites like Facebook, MySpace, and YouTube to market their vehicles. They post videos, games and other content tailored for these sites' subscribers to help promote their brands and reach owners and enthusiasts in novel ways. While automakers won't disclose their spending, experts say these sites can guide large numbers of potential customers to company websites. Some automakers like Jeep and Chevrolet have had success engaging with users and generating positive buzz through creative promotions on social networks. However, others note that social media may not directly lead to purchases as effectively as other forms of advertising.