One or more techniques and/or systems are provided for determining whether a vehicle comprises a sufficient amount of fuel to reach a destination. Making such a determination may comprise, among other things, estimating an amount of fuel required to reach the destination and/or estimating a rate of consumption along a travel route. Such estimates may be based upon factors external to the vehicle, including, among other things, topology of the travel route, current and/or predicted traffic patterns along the travel route, and/or driving habits of a user or others whom have navigated a similar route (or at least a portion of the route). When it is determined that the vehicle comprises an insufficient amount of fuel, a refueling notice indicative of the determination may be provided. In one embodiment, such a refueling may also suggest possible refueling stations along the travel route.