Cheaper fuel in Foz draws Paraguayan drivers, but the bridge queue can eat the savings

After years of traffic flowing the other way, the math has flipped at the border: filling up in Foz do Iguaçu is now cheaper than in Ciudad del Este, and Paraguayan drivers are crossing the Friendship Bridge again just to top up the tank. Paraguay's Última Hora newspaper reported the movement on August 13, quoting drivers who make the crossing for the price gap.

The numbers explain the pull. Per the report, S-10 diesel runs about G. 8,000 per liter in Foz versus G. 10,800 in Ciudad del Este; premium gasoline is around G. 7,500 on the Brazilian side, against more than G. 9,000 on the Paraguayan side. At Marco Três's exchange rate today (G. 1,000 is about R$ 0.87), Brazilian diesel comes to roughly R$ 6.94 a liter. The saving reaches about G. 3,000 per liter, close to G. 140,000 on a full tank.

On the Brazilian side, the price tracks the national drop. According to ANP, regular gasoline in Foz averages R$ 6.42 and diesel R$ 6.77 a liter (August 11 survey). The reversal is credited to recent tax cuts by Brazil's federal and state governments, while Paraguay's prices stayed above the regional average despite Petropar's occasional reductions.

But the discount comes with a catch worth measuring before you leave: the Friendship Bridge sees heavy traffic, and the wait at Brazil's Federal Revenue checkpoint burns fuel and time, so part of the saving can vanish in the queue. As Última Hora put it, for those with patience the math still favors Foz; for those short on time, it may not pay off.

That is where checking the crossing live before deciding helps. Marco Três tracks the Friendship Bridge queue in real time, with wait times by direction. A quick look tells you whether the pump savings beat the customs delay at that moment.