U.S. Retail Diesel Tops $6 a Gallon for First Time as EIA Warns of Two-Year Stock Deficit
The first-ever $6 national average reflects concurrent damage to Middle Eastern crude flows and refinery capacity that the EIA projects will keep distillate stocks depleted through 2027.
The U.S. national average retail diesel price crossed $6 per gallon for the first time on Thursday (2026-09-10), GasBuddy data showed. That cleared a threshold last approached during the 2022 spike, with no obvious corrective mechanism now in view.4,7
ICE Brent crude front-month was at $107.56 a barrel as of Tuesday morning (2026-09-15). Brent briefly touched near $110 in overnight trading ahead of Friday (2026-09-04), and closed the week ending Friday (2026-09-11) above $100 per barrel for the first time since mid-May. The benchmark has risen close to 80 percent since the start of the year, according to Bluewin.6,5
The EIA's September Short-Term Energy Outlook gave little reason for optimism on supply. The agency forecast U.S. distillate fuel oil inventories to fall below 100 million barrels in September and remain below the five-year (2021-2025) average low through the end of 2026 and most of 2027. That is an unusual degree of forward pessimism from a government agency on a fuel that underpins freight, agriculture, and heating.7
The cause traces to the U.S.-Iran conflict. Before the war, the Strait of Hormuz handled roughly 20 million barrels of crude oil and refined products per day. Analysts put the sustained daily shortfall since the fighting began at 5 million to 6 million barrels, a gap that has persisted without a clear resolution.1,8
Saudi Arabia's East-West pipeline, which connects the Persian Gulf to the Red Sea, has been running at full capacity as a partial bypass, moving around 5 million barrels a day. That covers a fraction of what Hormuz once handled.8
The supply problem is compounded at the refining level, where both Russian and Middle Eastern capacity has been hit simultaneously. Analyst Book described it plainly: "The cracks are huge everywhere, and lots of refineries are out. Even adding more crude oil won't solve the problem, which is that refineries in Russia have been damaged by drones at the same time that refineries in the Middle East have been" damaged.1
That framing became politically contested. U.S. Energy Secretary Chris Wright attributed rising fuel prices in part to Ukraine's drone and missile strikes on Russian refining infrastructure. A Foreign Policy analysis countered that the primary driver is the Trump administration's Iran campaign, with Ukraine's contribution smaller by comparison. For a trucker or a farmer paying retail prices, the distinction changes little about the bill.8
GasBuddy's De Haan estimated that Americans spent roughly $1.39 billion more on gasoline over Labor Day weekend compared with 2025, covering only the gasoline component of a fuel bill that runs far deeper into diesel.3
The summer trajectory was steep throughout. U.S. diesel hit $5.688 a gallon as of September 2 (2026-09-02), its highest since April's peak during the initial phase of the Iran conflict, before climbing through $6 a week later. Bank analysts called diesel "the epicenter of the rally" as early as the week of August 24 (2026-08-24).2,7
With distillate inventories projected to stay below the five-year floor through winter and refinery repair timelines unclear, the EIA's forecast represents the floor, not the ceiling. Any further disruption to Hormuz shipping or additional drone strikes on processing capacity would hit a market with no inventory cushion to absorb them.7,1