驶入加油站前，巴西的驾车族会计算传统汽油和乙醇燃料哪个更便宜（生物乙醇比传统汽油的能源含量低30%左右 ） ， 然后在汽油和乙醇泵之间作出选择。
Just before entering a gas station, Brazilian drivers calculate whether conventional gasoline or ethanol is cheaper (bioethanol has 30% less energy content than traditional gasoline), then choose between a gasoline and an ethanol pump.