Abstract: Regarding vehicles as social objects is justifiable, since, they have been intelligent. The transportation systems have positively changed due to this vehicular advance technology. Nowadays, vehicles can interact with each other using wireless transceiver devices. Besides, they also have a special hardware which helps them to make decisions. All these facilities enable vehicles to behave as social objects. As information sharing is a main purpose for designing Social Networks (SNs), this study tries to link both SNs and Vehicular Networks (VNs) to produce a new multidisciplinary research field Vehicular Social Networks (VSNs). It is going to share information among only vehicles that have common interests instead of all. The rumor spreading is easy well-known algorithm for spreading information in graphs. So, this algorithm will be implemented in VSNs with name Vehicular Rumor Spreading Algorithm (VRSA) taking in account the main constraints of VNs. The results emphasis that the communication cost of VRSA is lower than both of the contagion model and multicasting model. However, in terms of delivery delay it still has a higher deliver delay than the both models. It is concluded that the VRS may be suitable for diffusing less important information when the communication cost is carefully considered. On the other hand, the contagion model is a perfect way to share information in real time applications.