Under the auspices of the BioEthanol for Sustainable Transport (BEST) project, the first ethanol-powered (E95 or ED95) bus began operations in São Paulo city in December 2007 as a one-year trial project. The bus is a Scania model with a modified diesel engine capable of running with 95% hydrous ethanol blended with a 5% ignition improver, with a Marcopolo body. Scania adjusted the compression ratio from 18:1 to 28:1, added larger fuel injection nozzles, and altered the injection timing.
