I think that you are failing to assess the true operating costs of a vehicle if this is going to be your "third" vehicle. You would save more money by dumping other wasteful vehicles and purchasing a used Volt if you have access to free electric charging. In order to fully-utilize the "electric" function of a Volt, you will need a charging station at home as well as a charging station at work. Otherwise, you are simply driving an efficient "gasoline-powered" vehicle. The Department of Energy provides a lifetime cost tool that you should use to determine which vehicle is most cost efficient for you to operate. It will also give you a much better idea of how much you can save by dumping your surplus additional vehicles. https://www.afdc.energy.gov/calc/