Diesel Crack Spread Hits Record $102 as Refining Bottlenecks Squeeze Supply

The U.S. diesel crack spread hit a record $102.20 a barrel Monday, five times its normal level, as refinery strikes and Russia's export ban drive a shortage that crude releases cannot fix. The benchmark price for European diesel reached $167 a barrel late last week, nearly double the $87 a year earlier, according to data from price reporting agency OPIS.

"Absent a supply recovery, diesel markets will stay tight, volatile, and expensive well into next year," Francisco Blanch, head of global commodities research at Bank of America, said.

U.S. distillate exports — which include diesel, heating oil, and other products — rose to a record 1.9 million barrels a day in the first week of August, leaving domestic inventories at their lowest level for this time of year in three decades. Persian Gulf diesel exports are down 80 percent year over year, according to Kpler data cited by Jefferies, while global diesel inventories sit below their five-year minimum, per Citi's Anthony Yuen.

Diesel powers the trucks that move food and manufactured goods, the equipment that plants and harvests crops, and the ships that carry global trade. A sustained shortage can push costs through freight rates, producer prices, and eventually the checkout line, with the Northern Hemisphere entering harvest season and winter heating demand approaching.

Refining, Not Crude, Is the Bottleneck

When Iran effectively closed the Strait of Hormuz after the war with the U.S. began Feb. 28, refiners shifted production toward jet fuel after fears of a global shortage, tightening diesel supplies in the process. Jet fuel and diesel are both middle distillates derived from crude oil, limiting refiners' ability to boost one without reducing the other.

Strikes on refineries in Iran, Ukraine, and Saudi Arabia's Jazan facility have knocked out processing capacity, while Russia has banned diesel exports outright after sustained Ukrainian drone attacks. The U.S. Strategic Petroleum Reserve has fallen below 300 million barrels from releases meant to cap crude prices — depleting emergency stockpiles while doing nothing for the diesel shortfall, since the SPR holds crude, not refined product.

The squeeze is translating into windfall margins for U.S. refiners. Marathon Petroleum and Valero more than doubled their per-barrel refining margins in the second quarter, collectively returning more than $5 billion to shareholders through buybacks and dividends. The northwest Europe diesel crack spread — the premium of diesel over crude — was around $90 a barrel Friday, compared with an average of $24 last year.

The last time the European diesel crack spread traded near these levels was during the 2022 energy crisis, when Russia's invasion of Ukraine disrupted refined-product flows across the Atlantic basin. That episode saw diesel prices peak above $150 a barrel before demand destruction and a mild winter brought relief by spring 2023.

Demand Destruction Is Slow to Arrive

Diesel is particularly resistant to rapid demand destruction because much of its consumption is difficult to eliminate in the short term. A trucking company cannot quickly replace its fleet, and a farmer cannot stop using diesel during harvest.

June Goh, senior oil market analyst at Sparta Commodities, said diesel demand has remained strong even as retail prices rose, because there is little alternative for fuel needed for industrial activities.

Goldman Sachs warned last week that diesel faces a greater risk of persistent scarcity than crude as winter approaches, noting the market was already tight before the Iran war began. Bank of America said the market is entering its strongest seasonal demand period with "very little margin for error."

The timing is unfavorable. Refineries will begin seasonal maintenance in the coming weeks, temporarily taking production capacity offline just as heating-fuel demand typically increases with falling temperatures. Russia's Orsk refinery, with annual processing capacity of about 6 million tons, halted operations after an Aug. 11 attack, with repairs expected to take up to six months.

The outlook now depends heavily on whether lost supplies return. A recovery in Russian refining and exports or a normalization of Middle Eastern flows could ease the squeeze. But if disruptions persist, global buyers are likely to keep turning to U.S. refiners, drawing down already-thin domestic inventories into the winter heating season. For truckers and farmers, that means fuel costs eating into margins right as harvest season demands maximum diesel use. For everyone else, it means the cost gets passed downstream into freight rates, producer prices, and eventually the checkout line.

This article is for informational purposes only and does not constitute investment advice.