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In Brazil, the introduction of high biodiesel blends has been defined by standard CNPE no 16 of 2018, which stablished the latest chronogram for compulsory biodiesel incorporation to all diesel fuel commercialized nationally, from 11% v/v in 2019 to 15% v/v in 2023, and up to B20 in case of captive fleets. Nevertheless, with the adoption of more stringent emission standards in Brazil, concerns arise from the unrestricted use of higher biodiesel blends, especially regarding the assurance of Heavy-Duty Diesel (HDD) emissions aftertreatment systems correct operation and of fulfillment of national emissions requirements defined by PROCONVE. Considering the current emission standards (PROCONVE P7, equivalent to EURO V), such concerns already take place and become critical with the perspective of PROCONVE P8 (EURO VI) implementation, in 2022 for new models and 2023 for all commercialized vehicles, as defined by CONAMA Resolution no 490/2018.