Dual-powered cars aren't quite as unique as they used to be, but a vehicle that's able to run on three different power sources should be enough to perk up anyone's energy-saving, cost-cutting ears, even if just a little bit. At least that's what Fiat hopes will be your reaction to its latest concept car / tongue-twister, the Multipla Multi-eco. In addition to running on plain-old gasoline, it'll get you where you want to go on either methane or E85 bioethanol. The methane gets a fuel tank of its own, but the car's ECU is able to sort out the gas and bioethanol itself, letting you use any combination of them. This being a concept vehicle, however, you won't exactly be able to get behind the wheel of one anytime soon. However, Fiat is making a slight variation commercially available in the form of the Panda Panda, which lacks the E85 bioethanol option but still lets you run on your choice of methane or gasoline.