Brazilian Oil & Gas giant Petrobras has carried out the first bunker filling with renewable content in Brazil on 30 December 2022. At the Rio Grande Terminal Terig in Rio Grande do Sul, Transpetro’s Darcy Ribeiro vessel was fueled with the new, lower carbon footprint fuel, a mixture of 90% bunker volume of mineral origin and 10% of biodiesel. The purpose of the test is to evaluate the use of the bunker with renewable content for two months and the logistical challenges associated with the use of the product.The renewable fraction of the new fuel has the potential to reduce greenhouse gas emissions in relation to the bunker when considered over the full life cycle. The estimated percentage reduction of CO2 equivalent emissions from this mixture is around 7%.Laboratory tests confirm the viability of the mixtureIn the first stage of the project, during the tests carried out in the laboratory of the Petrobras Research and Development Center (Cenpes), no impacts were found in meeting the main properties of the bunker specification. The assessment of the burning quality and the stability of the mixture indicated the approval for the field test in a sea vessel. It is expected that the operation of the ship will confirm the laboratory results and will be uneventful in the performance of the engines, filters, and fuel purification systems.