Literally flexible fuel, a flex fuel engine or vehicle is able to use several different fuels for its operation. For example, there are LPG / petrol or petrol / E85 vehicles.
The advantage of flex fuel vehicles is that they can profit from less expensive or more sustainable sources of fuel, without cutting themselves off from the dense distribution infrastructure for standard fuels.
In this way, local resources (sugar cane ethanol in Brazil) or alternative resources (LPG, biofuels) can be used without problems caused by a lack of supply that would limit their development.
Flex fuel engines therefore provide a good method for transitioning from the current system, based on limited oil reserves, to a system open to several types of fuel, some of which are renewable and low in carbon.
A flex fuel vehicle can use either conventional petrol or E85 ethanol-based biofuel. © Post406 CC by 2.0