Brazil's government scrambles to prevent a trucker strike as diesel prices surge 20% amid the Iran war oil shock. President Lula da Silva's administration unveiled emergency measures including tax breaks, subsidies, and enhanced monitoring to appease drivers threatening disruptive stoppages ahead of October elections. Petrobras recently raised refinery gate diesel prices by R$0.38, partially offsetting government relief efforts.

Brazil's vulnerability stems from its heavy reliance on road transport, with 60% of goods moved by truck and agriculture dependent on diesel. The country imports about one-quarter of its diesel consumption from Russia, the US, and Gulf states, lacking sufficient refining capacity. Higher fuel costs quickly translate to inflation, creating political headaches for Lula's government.

Industry groups warn of potential supply shortages if domestic prices remain below international levels, as importers may halt shipments to avoid losses. The crisis echoes 2022 when former President Bolsonaro fired Petrobras executives over fuel prices. With Brazil's economy particularly exposed to diesel volatility, the government estimates its measures will reduce prices by R$0.64 per liter, though effectiveness remains uncertain as truckers prepare for negotiations with ministers.