U.S. Diesel Prices Surpass $6 a Gallon as Global Conflicts Disrupt Supply

U.S. diesel prices reached a historic milestone on Friday, surpassing $6 per gallon for the first time as ongoing military conflicts in Ukraine and Iran trigger severe disruptions to global fuel supplies. The average national price has climbed to $6.0556 per gallon, creating significant financial pressure on transportation and agricultural sectors.

According to data from AAA, truck drivers and farmers are now paying approximately 63% more for diesel than they were during the same period last year. The cost burden is even more acute in California, the nation’s largest agricultural producer, where diesel averages nearly $7.98 per gallon.

The surge in fuel costs coincides with a sharp rise in crude oil prices. U.S. crude futures topped $100 per barrel for the first time since May, with September gains reaching roughly 20%. This escalation is largely attributed to intensified fighting involving the U.S. and Iran.

Industry experts warn that the ripple effects of high diesel prices will permeate the broader economy. Bob McNally, president of Rapidan Energy, described diesel as the “more insidious, more costly, and more impactful fuel” compared to regular gasoline. He noted that diesel powers the trucks, trains, and ships responsible for moving goods, as well as the machinery used in food production and even residential heating and electricity generation in some areas.

“As we climb higher, it is a real concern,” McNally said during an appearance on CNBC’s “The Exchange.” He emphasized that higher diesel costs are inevitably passed down to consumers in the form of increased prices for food, consumer goods, and energy.

Patrick De Haan, head of petroleum analysis at GasBuddy, echoed these concerns, labeling sustained diesel prices at current levels as a “silent killer” of the U.S. economy. During a Tuesday interview with CNBC’s “Power Lunch,” De Haan highlighted that Americans are spending approximately $700 million more daily on gas and diesel than a year ago. He also noted that retail gasoline prices hit a Labor Day record of $4.15 per gallon earlier this week.

Supply constraints are primarily driven by infrastructure damage and geopolitical maneuvering. Kyiv’s strikes on Russian refineries have forced Moscow to ban diesel exports, while Iranian forces and their Houthi allies in Yemen have attacked refineries belonging to U.S. Gulf allies. Additionally, fuel exports through the Strait of Hormuz remain constrained due to Iranian attacks on tankers.

These disruptions have effectively taken about 5 million barrels per day of refining capacity offline, according to Valero, further tightening supply and driving prices to unprecedented heights.