Diesel Prices Surge Amid Global Conflicts and Supply Chain Pressures

On August 13, 2026, a driver prepared to refuel their semi-truck in Nortrees, Texas. Diesel prices were increasing as various international conflicts disrupted the global fuel supply. Tensions in Iran impacted shipping through the Strait of Hormuz. Meanwhile, Ukrainian assaults on Russian refineries further affected fuel exports. These situations strained the supply chain, leading to rising costs.

According to AAA, diesel prices reached a record high, with the national average hitting $5.85 per gallon. This surpassed June 2022 rates when prices hit $5.81 following Russia’s invasion of Ukraine. Diesel is crucial for powering the U.S. industrial supply chain, especially through transportation by trains, tractors, and trucks, explains Patrick De Haan from GasBuddy, an app monitoring fuel prices.

Before the Iran conflict, a gallon of diesel cost $3.76. With the price now over $2 higher, businesses face rising supply chain expenses. When diesel becomes more expensive, costs increase across various sectors. Farm equipment primarily relies on diesel, so food production costs could rise, impacting consumer prices. Additionally, transportation costs for goods are likely to surge.

Approximately 90% of 500,000 U.S. school buses use diesel, and higher prices strain district budgets as the school year begins. Americans already experience ongoing inflation. Data from the Consumer Price Index reports a 3.4% increase over the past year as of August. Rising energy costs impact household budgets, especially for lower-income families, advises the Federal Reserve Bank of New York.

The Iran conflict, which began in late February, heightened prices for most petroleum products by limiting flows through the Strait of Hormuz. Other global pressures also exposed diesel to price increases. Asian refineries have restricted diesel exports, further squeezing supply. Attacks on Russian oil refineries caused disruption, leading Russia to reduce diesel exports and import fuel from India, Kazakhstan, and Belarus.

Jet fuel prices also surged during the conflict. In response, U.S. refiners increased jet fuel production at the expense of diesel supplies, notes Jaime Brito, head of Dow Jones Energy. This strategy reduced market availability of diesel.

Impact of Diesel Price Increases

While Americans frequently encounter gasoline, diesel powers much of the industrial supply chain. “Diesel is the blood of the economy. It moves goods, food, agricultural products from farms to supermarkets,” Brito emphasizes. Though both diesel and gasoline derive from crude oil, they undergo different refining processes, resulting in distinct products suited for various engines.

Seasonal factors could sustain high diesel prices for months. The cost often rises ahead of the fall harvest season when 75% of agricultural equipment, according to the Engine Technology Forum, operates on diesel. As winter approaches, demand for heating oil, nearly identical to diesel, will increase. When one product’s price rises, so does the other’s.