Prototype F7 was earmarked for testing of electrical systems and hot weather testing and was used for these purposes by Porsche on the U.S. West Coast and in Europe. A number of photographs of the car in testing exist and can be seen in Jürgen Lewandowski’s book 959: The Art and Car, including one photo of it posed alongside a 911 with the Golden Gate Bridge in the background and some with the car covered in snow. Furthermore, other photographs show the car with several different interior configurations, including having different seats fitted and an interior completely stripped of leather. During this time, the 959 certainly saw extensive use by Porsche engineers to ensure that the systems it tested would be ready for full production in a few months’ time.

Most prototype vehicles owned by Porsche are sadly destroyed at the end of their testing period rather than being placed into storage or sold off to private customers, and this proved to be the case with the vast majority of the F-Series 959s. However, F7 is one of the few that escaped. At the end of its testing regimen, the car returned to Stuttgart where it was retrimmed. It is believed that at this point, noted Porsche importer and dealer Vasek Polak was made to purchase F7 along with its sister cars F6 and F9, under the premise that it would be fully restored, rebuilt, and converted to production specification to be sold as a customer car. However, Polak refused this and purchased the car outright, insisting that no work be done on the cars prior to him taking possession. As a result, Polak was required by Porsche to never sell, race, or register the car for road use unless it was fully refurbished by the factory.