The national average price of diesel in the United States reached $6.4866 a gallon on 19 September, according to AAA. It was $6.16 a week earlier, meaning it rose about 33 cents, or 5.3 percent, in seven days. A year ago it was $3.71. Immediately before the US-Iran conflict began on 28 February, it was $3.75.
That is roughly 73 percent more per gallon than before the Strait of Hormuz crisis, and the rise has not been linear: the weekly national average was about $5.97 on 7 September and $6.29 on 14 September before the daily reading moved to $6.49.
The mechanics are not only about crude. The Gulf Coast diesel crack spread, the gap between diesel and the oil it is refined from, passed $100 a barrel at the start of September, a fivefold jump from a pre-conflict baseline around $20. That is a refining premium, not a crude premium, and it reflects a specific set of constraints: the effective closure of Hormuz, Russia’s diesel export ban compounded by Ukrainian strikes on its refineries, American refinery utilisation running at 98 percent, competition for yield from high-margin jet fuel, and freight and agriculture demand that simply does not fall when the price rises.
Barclays put it plainly: cutting supply from Gulf and Russian refineries has made the United States the crucial supplier of distilled products.
Now look back at this week’s corporate news with that number in hand.
J.B. Hunt warned third-quarter earnings would fall five to ten percent, citing at least $10 million of fuel cost. Bilfinger cut its margin guidance and announced up to 1,500 job cuts, blaming postponed client investment amid the Middle East conflict. Volkswagen wrote down €6 billion. The Federal Reserve raised rates for the first time in three years. US factory output fell for the first time in eight months. Kroger trimmed its sales target as shoppers pulled back.
Not one of those is a diesel story. Every one of them has diesel underneath it.
This is what an input price actually is, and why coffee people understand it better than most. Nobody drinks diesel. Nobody puts it on a menu. But it is the price of moving a green bean from a port to a roastery, a roasted bag from a roastery to a shop, and a pastry from a bakery to a counter at six in the morning. It arrives in your business as three separate small increases from three separate suppliers, none of whom mention it, and you experience it as a vague sense that everything has got more expensive at once.
Which is why the single most useful thing a small operator can do right now is find out how many of their line items are actually one line item. Delivery charges, supplier surcharges, wholesale price increases, the courier, the laundry service, the waste collection. Trace them back and a surprising number converge on the same gallon.
The practical difference that makes is real. Five unrelated cost increases feel like bad luck and get absorbed one at a time. One cost increase arriving five ways is a repricing decision, and it gets made once.
The EIA had forecast diesel would average $5.07 a gallon across 2026.
Nobody sells it. Everybody buys it.
Source: Business Today, “US diesel price hits record $6.49: How much prices have surged since Hormuz crisis”
