Most new cars sold in Brazil, for over a decade now, can run on gasoline or sugar-cane ethanol, or a mix of both in any proportion. One can fill up with either

Most new cars sold in Brazil, for over a decade now, can run on gasoline or sugar-cane ethanol, or a mix of both in any proportion. One can fill up with either or both without bothering informing the car, and when turned on the engine will quickly adjust to the mix present. AFAIK, that adjusting is mostly ML.