Gas stations in Ribeirão Preto, São Paulo, have increased diesel prices since the onset of hostilities involving the U.S. and Israel against Iran, despite Petrobras not authorizing any price adjustments among fuel distributors. According to the Association of Gas Stations of Ribeirão Preto (ANPRP), which represents 85 sellers in the area, prices rose by an average of R$ 1 per liter during the first ten days of March. This price hike has occurred despite federal measures intended to control price fluctuations.

The spike in diesel prices has prompted the Brazilian government to introduce a new package of measures aimed at stabilizing and lowering diesel costs for consumers. These measures include fiscal exemptions on diesel and new taxes on oil exports, which the Union hopes will alleviate the financial burden on consumers amid rising fuel prices. The situation showcases the tension between local market decisions and federal pricing strategies in Brazil's fuel sector.

The final price of fuels such as diesel is influenced by various factors, including the international oil barrel quotation, taxes, transportation costs, and distribution expenses. As local gas stations continue to raise prices independently of Petrobras's directives, it raises questions about market regulation and consumer protections in Brazil's energy sector, particularly during times of geopolitical unrest that impact fuel supply and prices.