In general, Zipcar requires that members return the vehicle with a full gas tank unless it is stated otherwise in the reservation details. Car sharing is often designed around the idea of convenience, and fueling the car before returning it is typically part of that experience. Zipcar usually provides its members with a fuel card located in the glove compartment, making it easy to refill the tank during the rental period. If the tank is not full upon return, there may be a refueling fee, which can add additional costs to your rental. Therefore, it is wise to check the fuel level before returning the car to avoid any unexpected charges. Members can refer to the current web page for specifics regarding fuel policies, as they may vary by location or circumstances.