Diesel Reaches All-Time High of $5.820 as War Fuel Costs Hit $97.5 Billion

On Thursday, the US national average for diesel fuel hit a record $5.820 per gallon, based on real-time data from GasBuddy.

The earlier record of $5.819 was set on June 17, 2022. This new high comes at a time when US distillate stockpiles are at their lowest for this time of year on record.

Diesel Surpasses 2022 Peak

GasBuddy's head of petroleum analysis, Patrick De Haan, shared the record on X. He has recently stated that 2026 is expected to be the costliest year for diesel in US history.

BREAKING: according to GasBuddy data, the live U.S. national average price of diesel has set a new record: $5.820/gal, surpassing the previous daily $5.819/gal all-time high that occurred June 17, 2022. (9/3/26 3:25pm ET)

— Patrick De Haan (@GasBuddyGuy) September 3, 2026

The price increase occurs against a backdrop of low inventories. According to the EIA, distillate stocks were roughly 14% under the five-year average for the week ending August 28, 2026.

Those stockpiles were at their weakest August levels for that period since 1982. Moreover, East Coast stores have dropped to an unprecedented low.

Refinery utilization reached 98% for the week ending August 28, indicating maximum output. Diesel crack spreads exceeded $100 per barrel, Reuters reported.

“This is especially problematic as September marks the start of the fuel’s peak-demand period. The diesel market is facing a major shortage,” The Kobeissi Letter said.

Fuel Expenses Add to Inflation Concerns

Brown University researchers have quantified the financial strain. The Iran War Energy Cost Tracker calculates that consumers have borne $97.5 billion since hostilities started on February 28.

This amounts to $743.99 per US household. Diesel fuel constitutes $44.14 billion of that sum, as the national average has risen 57.6% from the pre-war level of $3.670 per gallon.

Since July 15, diesel has remained above $5 per gallon. Harvest season and winter heating needs are still to come. Rystad Energy analysts anticipate that consumers will face higher costs as diesel prices rise.

“Think of the groceries that get shipped around the nation, and fruits and vegetables that come from California and move by truck or rail. It’s inflationary,” Susan Bell, senior vice president of downstream research at Rystad Energy, said.

European gas prices and eurozone inflation have already been pushed up by energy shocks this year. The upcoming EIA inventory report, scheduled for September 10, will indicate if refiners can replenish stocks ahead of rising demand.