As shoppers in the U.S. grapple with rising prices at grocery stores, a significant hike in diesel fuel costs threatens to make their total bills even more startling.
Global petroleum markets are under increasing strain, particularly due to ongoing conflicts in the Middle East that jeopardize vital oil shipping routes like the Strait of Hormuz and Bab al-Mandab. Additionally, attacks have compromised Saudi Arabia’s route to avoid Hormuz. The unrest, which has escalated since the Iran war began on February 28, has pushed diesel prices to a startling $6.00 per gallon nationwide.
Henry Hanscom, the American Trucking Association’s chief advocacy and public affairs officer, explained that “Diesel is one of trucking’s largest operating expenses, so an increase of this magnitude creates immediate pressure on motor carriers, who run on tight margins.” He added that it reflects broader economic trends—when families spend more on fuel, they have less leftover for other expenses, leading to a potential decrease in demand for the goods that transportation services provide.
High diesel prices can translate into higher costs for everyday items such as groceries and fertilizers, affecting consumers even if they don’t directly use diesel vehicles, as noted in an analysis by the American Enterprise Institute.
Food prices have been rising steadily, with an increase of 2.7% from the previous year as of August. Grocery prices went up by 2.2%, while fruits and vegetables rose by 3.2%, along with a 3.7% hike in nonalcoholic beverages, according to data from the Bureau of Labor Statistics.
“The 0.7% uptick in food prices in April was likely linked to surging energy costs that coincided with the onset of the Iran conflict,” remarked Richard Volpe, an agricultural economics professor at Cal Poly. “Since then, it seems retailers and manufacturers are trying to limit price increases despite facing reduced margins.” He noted that due to the narrow profit margins of many retailers, which hover around 1-2%, it’s likely we could see an increase in food inflation in upcoming reports as energy prices rise.
Volpe continued, “Many of the key Producer Price Index (PPI) figures have been rising this year with little retail price adjustment. Given the competitive landscape and low consumer sentiment, food companies are likely trying to weather these high energy costs without boosting their prices.”
the rise in prices is not slowing down- national average price of gasoline continues to rise alongside diesel, which continues to climb further into record territory. LIVE GasBuddy data (not yesterday’s data sold as today): pic.twitter.com/gYDvfejxCj
— Patrick De Haan (@GasBuddyGuy) September 11, 2026
Before the onset of the Iran war in February, diesel was priced at around $3.72 per gallon, marking a roughly 60% rise in just over six months, according to Bureau of Transportation statistics.
This surge follows ongoing chaos in global energy markets, as the Iran War continues to threaten shipping routes through the Strait of Hormuz and Houthi attacks disrupt operations around the Red Sea and Bab al-Mandab, putting these critical oil corridors under immense stress.
Earlier in September, diesel briefly hit a record high of $5.85 per gallon, surpassing previous peaks from 2022 due to continuing disruptions in global fuel supplies.
While many Americans don’t drive diesel vehicles, they still feel the impact through the prices of goods they buy. For instance, trucks transported 11.27 billion tons of freight in 2024, which accounted for a substantial 72.7% of domestic freight tonnage, according to the American Trucking Associations.
Energy analyst Stuart Turley pointed out that “The price of Diesel will be the inflationary problem that neither the Fed nor the U.S. Treasury can influence. The disruption in the oil markets will take six to eight months to stabilize.” He emphasized that there are only two ways to potentially lower fuel prices: increase refining capacity, which takes a long time to establish, or decrease demand.
Food prices are pressured from both farm and transportation sides. Farmers heavily rely on diesel for their machinery, while natural gas plays a crucial role in fertilizer production, according to the Department of Agriculture.
The conflict has also thrown fertilizer markets into disarray, with a significant portion of fertilizer production reliant on shipments through the Gulf. Prices for anhydrous ammonia, for instance, saw an increase of nearly 36% since the war began, rising from $828 to $1,123 per ton by mid-April.
“With tanker daily rates now exceeding $800,000 and insurance at an all-time high, delivery costs to refineries are significantly impacted. The diesel crack spread is around $200 per barrel. None of these issues are going to balance out before the midterm elections and will extend into early 2027,” Turley observed.
The strategic importance of the Strait of Hormuz is significant—approximately 20% of global petroleum liquid consumption passed through it in the first half of 2025, according to the U.S. Energy Information Administration.
Experts predict that families might cut back on dining out and other discretionary purchases as rising fuel costs affect their budgets, as noted by University of Cincinnati economics professor Debashis Pal back in March when diesel prices were hovering around $5.06 per gallon.
