Diesel at 5-Year Highs: Structural Supply Shock Threatens Fleet Margins

Diesel prices have reached their highest settlement levels in history, driven by a confluence of structural supply constraints rather than temporary shocks. Ukrainian drone strikes on Russian refineries have eliminated over 1 million barrels per day of refining capacity specifically oriented toward diesel production, while ongoing disruptions at the Strait of Hormuz further constrain global supply. Unlike the dramatic but short-lived spikes of 2008 and 2022, industry analysts expect this elevated price environment to persist for months as inventories remain depleted and seasonal maintenance shutdowns compound the shortage. For trucking fleets and logistics operators, this diesel shock presents asymmetrical operational pain.

While truckload carriers can largely pass fuel costs to shippers through fuel surcharges, empty and backhaul miles—typically 12–13% of total mileage—generate no surcharge recovery, directly compressing margins. Regional disparities are acute: the East Coast and Northeast face historically low diesel inventories, while California diesel has breached $7 per gallon. The unprecedented diesel-to-crude crack spread signals that refiners cannot balance supply-demand dynamics through normal pricing mechanisms. Supply chain professionals must anticipate extended margin pressure, potential carrier service level degradation on low-margin lanes, and increased bankruptcies among smaller fleet operators.

Companies should review fuel hedging strategies, optimize loaded-to-empty mile ratios, and prepare for potential service reductions or rate increases from carriers disclosing earnings pressure. The cumulative economic impact over six months could exceed the combined toll of the 2008 financial crisis and 2022 energy shock.