Diesel prices in the US hit yet another record on Friday, soaring past $6 a gallon on average as Washington’s war with Iran disrupts the world’s flow of fuel.
asserted
war → hit → fuel
The national average of $6.05 is up from $5.85 last week and $3.70 this time last year, according to motor club AAA.
uncertain
average → accord → AAA
Higher diesel prices mean more expensive transportation for a long list of everyday goods.
asserted
prices → mean → goods
That’s because diesel is used for many freight and delivery networks.
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diesel → ’ → networks
And some businesses have already passed along steeper costs to consumers in the form of added fees on online orders and packages in the mail.
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businesses → pass → mail
Shoppers may feel more and more sticker shock, particularly in the grocery aisle.
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Shoppers → feel → aisle
Perishable foods, like meat and produce, face one of the most immediate strains of expensive diesel because they need to be hauled in and restocked frequently — or may be harvested using farm equipment powered by the fuel.
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they → face → fuel
It can take time for those costs to trickle down.
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costs → take → time
But the surge in diesel prices doesn’t appear to be going away anytime soon.
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surge → appear → prices
Prices at the pump for diesel and regular gasoline — which hit $4.29 on average in the US Friday — closely follow that of crude oil.
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which → hit → oil
And oil has renewed its rise recently.
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oil → renew → rise
American diesel prices are now significantly higher than they were before the US and Israel launched their war against Iran in late February, when the national average sat at about $3.76 per gallon per AAA.
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average → launch → AAA
Prices quickly climbed as the cost of crude oil — the main ingredient in refined fuel like diesel, as well as gasoline — soared amid supply chain disruptions across the Middle East, notably with most tanker traffic bottlenecked in the key Strait of Hormuz.
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traffic → climb → Hormuz
Despite prices cooling some during hopes for peace earlier in the summer, oil has now renewed its climb as fighting once more escalates.
Brent crude, the international standard, was trading at more than $105 a barrel Friday, up from roughly $70 before the war.
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crude → cool → war
When adjusted for inflation, however, prices have been higher in the past.
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prices → adjust → past
Ahead of the 2008 financial crisis, for example, diesel hit about $4.74 a gallon, equivalent to $7.20 in 2026, according to the government’s latest data.
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diesel → hit → data
And 2022’s then-record of nearly $5.82 — reached just months after Russia invaded Ukraine — would be about $6.56 this year when accounting for inflation.
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Russia → reach → inflation
That doesn’t take the pain away from today’s steep prices, which are already bringing ripple effects for the economy and wider costs of living.
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which → take → living
Drivers are feeling the pain with gasoline, too.
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Drivers → feel → gasoline
Diesel has been more expensive than gasoline in the US for decades, and its price has risen at a faster pace before.
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price → rise → pace
Some reasons include less flexibility in demand and diesel’s position in global commerce overall.
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reasons → include → commerce
Individual households may find ways to drive less when gas prices are high, for example, but there’s fewer immediate substitutes for networks that rely on diesel to haul goods worldwide.
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that → find → goods
It powers farm equipment and fishing boats, as well as the trains and trucks headed to grocery stores.
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It → power → stores
Fuel accounts for roughly 15% to 30% of the total cost of food, according to the Independent Grocers Alliance, a grouping of 7,500 global supermarkets.
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Fuel → account → supermarkets
So higher diesel costs often result in more expensive groceries, although it can take a while for energy shocks to wind their way through the supply chain.
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shocks → result → chain
Items that need to stay refrigerated while they’re transported are often the first to see prices rise, according to David Ortega, a professor of food economics and policy at Michigan State University.
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prices → need → University
In July, for example, overall US grocery prices were up 2.7% compared to a year prior, but seafood prices were up 7% and fresh fruit prices were up 4.9%.
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prices → compare → example
Ortega cautioned other factors can be at play, too.
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factors → caution → play
Lettuce also faced higher transportation costs in July, but a drop in demand due to the cyclospora outbreak caused prices to fall.
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prices → face → outbreak
Still, consumers could feel more of a squeeze the longer diesel prices remain high.
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prices → feel → squeeze
“Early on, much of the cost increase gets absorbed along the supply chain through existing freight contracts and retailer margins,” Ortega explained last week.
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Ortega → absorb → contracts
“But as contracts reprice and fuel surcharges take hold, more of that cost makes its way to the grocery store.”
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more → reprice → store
Fuel shocks range far and wide
Back in April, e-commerce giant Amazon rolled out a temporary 3.5% fuel and logistics surcharge on some third-party sellers.
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Amazon → range → sellers
United Parcel Service, FedEx and the United States Postal Service also moved to add fees on some of the packages they ship earlier in the war, citing rising costs for fuel overall.
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they → move → fuel
Experts warn that price hikes could mount the longer diesel remains expensive.
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diesel → warn → ?
A range of other products are also transported by diesel-powered networks, including clothing, cosmetics and furniture.
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range → transport → clothing
The ramifications extend beyond consumer goods.
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ramifications → extend → goods
Some public transit buses and trains also run on diesel.
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buses → run → diesel
And diesel generators are often used for backup or emergency power, if not central electricity sources in some remote parts of the world.
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generators → use → world
Experts warn the consequences could continue to deepen, particularly in African and Asian countries, which rely more on Middle East imports and have already been hit the hardest by energy shocks.
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which → warn → shocks
…and 7 more, not listed.
The Aporia
