A method and system for cooperatively caching digital content in a vehicle for sharing with other vehicles in a vehicle-to-vehicle network. A content utility value is assigned to each piece of digital content available on the network, where the utility value is a function of the popularity of the content, the freshness of the content, and the size of the content. Any piece of content with a sufficiently high content utility value is stored in a host vehicle's collective cache, so that other vehicles may be able to retrieve it quickly on demand. The host vehicle may cache a particular piece of digital content even if the host vehicle is not interested in it. The host vehicle periodically re-computes the content utility value for all digital content in the vehicle's cache to determine if any of the data should be evicted from the cache.