The national average price of diesel crossed $6 a gallon on Thursday. That has never happened before in the United States. Record diesel prices will affect more than the prices at the pump.
GasBuddy, which tracks pump prices in real time, called it just after the close of trading. AAA, which lags a little, had the average just under six bucks — up about 61% from $3.71 a year ago.
It was the third record in a single week. The federal government's own weekly number tells the same story: on September 7 the Energy Information Administration logged on-highway diesel at $5.967, a jump of nearly 37 cents in seven days and well past the old record of $5.810 set in June 2022.
Pennsylvania is already over $6. So are Oregon, Nevada, Arizona and Alaska. California is averaging $7.91, and De Haan reports five stations in the state listing diesel at $9.999 a gallon.
"Every truck, every delivery, every package, every grocery run just got more expensive," GasBuddy's Patrick De Haan wrote as the number increased.
Most Americans never buy a gallon of diesel. That is exactly why this is dangerous. You don't see the price, but you pay it anyway.
Why Diesel Is Spiking
Two wars are squeezing the same barrel.
The first is the U.S. war on Iran, now in its seventh month. Brent crude jumped to $108 a barrel Thursday as fighting escalated again.
Before the bombs started falling on February 28, crude sat around $70 and diesel was $3.76 a gallon. Tanker traffic through the Strait of Hormuz has been throttled ever since.
The second is Russia. Ukraine has spent this year hammering Russian refineries with drones, and Moscow has pulled back its fuel exports as a result. “There's just not enough diesel right now in Russia to export any volume of it,” GasBuddy analyst Patrick De Haan told CBS News.
The world isn't just short on crude. It's short on the refineries that turn crude into usable fuel.
The result is a supply cushion that has basically vanished.
U.S. distillate stocks — the category that covers both diesel and home heating oil — sat at 103.4 million barrels in late August, roughly 14% below the five-year average and the thinnest seasonal level in the modern EIA record.
The agency now expects those stocks to fall below 100 million barrels and stay under the five-year low through much of 2027. This is the season when inventories are supposed to be building ahead of fall refinery maintenance.
You Can't Carpool Your Way Out of Record Diesel Prices
When gas prices climb, people drive less, combine errands, put off a road trip. There is no version of that for diesel. It moves the trucks, trains, barges and container ships that carry nearly everything you own, and it runs the tractors, combines and construction equipment that make and build the rest.
“Diesel is an input to virtually everything we consume,” UC-Davis economist Erich Muehlegger told Axios.
Michigan State supply chain professor Jason Miller put it more bluntly in the same piece: gasoline matters more for your wallet, but for the economy as a whole, diesel matters more.
It's Already in the Wholesale Numbers
The Labor Department reported Thursday that wholesale diesel prices rose 24.1% in August alone, and that more than a third of the entire monthly increase in producer goods prices came from diesel. Annual wholesale inflation climbed to 5.4%.
Retailers have absorbed most of it so far, because they lock in supplier contracts and have margin to eat. That cushion doesn't last.
“The real turning point is if [higher diesel] sticks around for probably more than six weeks,” De Haan said. Then the fuel surcharges get renegotiated, and the cost lands on you.
Groceries go first. Food economist David Ortega of Michigan State told CBS News that refrigerated items traveling long distances — seafood, fresh produce — are the most exposed, while shelf-stable and locally grown food is better insulated.
Furniture is next. So are the destination charges on a new car.
Truckers and Farmers Are Eating It Right Now
Big carriers like FedEx and UPS simply raised their fuel surcharges. Small operators can't.
George O'Connor of the Owner-Operator Independent Drivers Association told Axios that small-business truckers “are the first to feel it when prices jump” and have almost no leverage to raise rates load to load. With freight margins already thin, a spike like this can wipe them out.
Farmers are getting hit on both ends. The war drove fertilizer costs up months ago, and now diesel is spiking exactly as combines roll into the fields.
Ohio corn and soybean farmer Jed Bower, president of the National Corn Growers Association, expects to spend $20,000 to $25,000 more on fuel this year than January prices implied.
One Texas farmer told Farm Journal his diesel bill rose $23,000 in a single month.
Bower told NPR he won't turn a profit after this harvest — the fourth straight year — and that he's hearing more about foreclosures and mounting distress across farm country. As the American Farm Bureau's John Newton summarized the problem: farmers buy retail and sell wholesale.
Winter Is Coming
Home heating oil is a close chemical cousin of diesel, drawn from the same shrinking pool. Roughly 80% of U.S. heating oil is burned in the Northeast, including here in Pennsylvania, where about five million households across the region depend on it.
Refinery maintenance season, harvest demand and the first cold snap are all about to hit the thinnest distillate inventories on record at once.
EIA has already warned the squeeze could push Northeast heating costs higher.
“Lord forbid we have a catastrophic hurricane,” Miller said. A single Gulf Coast refinery going down would make all of this worse.
The Fed Is About to Make You Pay Twice
The August consumer price index drops Friday, and the Federal Reserve meets September 16.
Markets are pricing in roughly a 70% chance of a quarter-point rate hike — the first increase in more than three years — largely because of the fuel shock.
If that happens, the same price spike that raises your grocery bill also raises your mortgage rate, your car loan and your credit card balance.
Who Owns This
The administration has already pulled most of its levers. Trump released 172 million barrels from the Strategic Petroleum Reserve in March and eased fuel delivery rules, leaving the reserve at its lowest level since 1982.
Rep. Marcy Kaptur, ranking Democrat on the House energy appropriations subcommittee, called it using a national security shield to clean up a self-inflicted crisis.
Energy analysts told CNN there is little left the White House can do in the short term.
Trump campaigned on gas below $2. Diesel is now $5.98 and he has warned that fuel costs likely won't fall before the midterms.
Transportation Secretary Sean Duffy insists the president is “trying to drive these prices down.”
Republican operatives are less optimistic. “Diesel's at an all-time high,” one told Axios. “Gas is about $4 a gallon. We can't message that away.”
Meanwhile, House Democrats on the Joint Economic Committee have flagged that Trump's own financial disclosures show substantial profits from oil and gas holdings this year — the same year his war sent those prices through the roof.
Goldman Sachs now sees a path to $120 oil. EIA just raised its 2027 diesel forecast to $4.40 a gallon and does not expect Middle East production to recover until at least the second quarter of that year.
The war has a cost. It's showing up on the pump, in the checkout line and on the heating bill.
