Diesel prices across Europe have climbed above 2.37 euros per liter, marking a notable rise over recent months. On September 17, 2026, the average price of diesel reached 2.371 euros per liter, an increase of 14 cents from the previous month. This rise has led to a full tank of 50 liters costing an average of 118.55 euros, up from 111.55 euros just 30 days ago—a difference of seven euros. The delay between rising crude oil prices and the corresponding increase at gas stations is typically between 10 and 15 days, meaning that the full impact of recent oil price increases will be felt in the coming weeks. The recent surge in crude oil prices, particularly for Brent crude, has been driven by escalating geopolitical tensions. A temporary calm in relations between the United States and Iran was broken on August 30 when hostilities resumed, causing Brent crude to jump from 89 to over 95 dollars per barrel in just three days. By mid-September, the price crossed the 100-dollar threshold. At the same time, the Houthi group, backed by Iran, seized control of Mokha in Yemen, moving closer to the strategic Bab el-Mandeb Strait. This development, combined with an attack on an Aramco oil depot in Saudi Arabia on September 8, further fueled market anxiety and pushed oil prices to 105.84 dollars per barrel. Patrick Pouyanné, CEO of TotalEnergies, stated that the company would maintain a price ceiling of 1.99 euros per liter for gasoline and 2.25 euros per liter for diesel at its 3,300 stations "as long as the Middle East conflict lasts." However, the national average diesel price has already surpassed this ceiling by over 12 cents. The price disparity between the most expensive and the cheapest stations is 26 cents per liter for diesel, which translates to a 13-euro difference for a full tank. With oil prices above 100 dollars per barrel, TotalEnergies is facing increasing pressure on its profit margins. For customers enrolled in the "Fuel Advantage" program, which combines an energy contract with membership in the TotalEnergies Club, a price cap of 1.99 euros per liter remains in place for all fuels, up to 2,000 liters per year. However, for the majority of drivers, the rising fuel costs are expected to significantly increase their expenses, especially with the back-to-school season approaching. On the government side, Minister Sébastien Lecornu announced on September 16 that sectoral aid would be extended until December 31, with increased support for fishermen at 35 cents per liter. However, no new measures have been announced for individual consumers.