# DOE Diesel Down 7.3 Cents to $5.523 _May 25, 2026_ > EIA's on-highway diesel index fell 7.3 cents to $5.523/gal for the week of May 25, trimming about $5.62 from the fuel cost of a 500-mile haul at the stated 6.5 mpg reference. Every tracked region runs at least 38% above its 5-year median. The DOE number (EIA's weekly average retail price of on-highway diesel, week of May 25) fell **7.3 cents** to **$5.523/gal**. At the stated 6.5 mpg reference that is **85.0 cents a mile** of fuel. The week's move trims about **$5.62** from the fuel cost of a 500-mile haul. [Chart: Diesel fuel cost per mile (at 6.5 mpg)](https://mondaydiesel.com/costpermile/diesel-cost-per-mile) ([data](https://mondaydiesel.com/costpermile/diesel-cost-per-mile.md) — chart image: https://mondaydiesel.com/charts/costpermile/diesel-cost-per-mile/chart.png) Notable moves from the same EIA on-highway diesel survey: - **Midwest (PADD 2):** $5.623/gal, down 2% on the week, 51% above its 5-year median. Spring planting season is the seasonal backdrop in the region, and the Midwest carries the widest above-median gap in the survey. - **Gulf Coast (PADD 3):** $5.045/gal, down 2% on the week, 43% above its 5-year median. Anchors the low end of the regional map. - **California:** $7.182/gal, down 1% on the week, 46% above its 5-year median. - **West Coast (PADD 5):** $6.500/gal, essentially flat on the week. The West-vs-Gulf gap holds at 145.5 cents/gal, with the West Coast paying that spread over the Gulf Coast. - **Rocky Mountain (PADD 4):** $5.493/gal, down 1% on the week, 41% above its 5-year median. At the wholesale layer, Gulf Coast ULSD spot settled at $3.857/gal on May 22 (the nearest business day) per EIA's daily spot series. New York Harbor ULSD settled at $3.957/gal the same day. Both are untaxed bulk prices, not pump reads. The retail-minus-spot gap against the Gulf Coast hub sits at $1.666/gal, a proxy for the full hub-to-pump spread including taxes and distribution, not a station margin. The national number stands 45% above its 5-year median for this calendar week. Every region in the survey runs at least 38% above its own 5-year median. --- Canonical URL: https://mondaydiesel.com/issues/2026-05-25