A 1.9. What are Flex-Fuel vehicles?
They are vehicles equipped with an engine management system that can accurately identify the presence of gasoline and/or ethanol in the fuel tank, and then automatically adjust the engine operation accordingly. There are versions that use ethanol sensors, which are installed either in the tank or on the fuel line and are more common in the United States, while others identify the presence of ethanol through a sensor that measures the amount of oxygen contained in the exhaust gas, which is the system in place in Brazil. In the USA and a few other countries like Canada and Sweden, vehicles run on both straight gasoline and or any blends with an ethanol content of up to 85 percent (E85) on non-winter days and 70 percent during the winter (E70). In Brazil, those vehicles run on gasoline, which contains 20 to 25 percent ethanol, and any blends with higher ethanol contents, or even 100 percent hydrous ethanol (E100). This difference in the design of Flex-Fuel systems is determined by the cha
