Why is diesel spiking when crude oil prices have not hit record highs?

Diesel prices are decoupled from crude because refining capacity, not crude availability, is the limiting factor. Heavy crude, which produces more diesel, has been constrained by reduced exports from Russia (down 10 percent of global diesel supply due to Ukrainian drone attacks on refineries), China throttling refining to protect reserves, and the U.S. losing its position as world's largest refiner to China. A barrel of crude is worthless until a refinery converts it into usable products; the shortage is in conversion capacity, not raw oil.

How do regional diesel prices differ so dramatically if they are all tied to the same commodity?

Wholesale diesel prices are built from the NYMEX ultra-low-sulfur diesel contract (New York Harbor barge price) as a foundation, but regional refining balances create spreads of 40 to 60 cents per gallon. The Colonial Pipeline, which runs from the Gulf Coast through the mid-Atlantic, anchors regional pricing to Gulf Coast capacity (the nation's largest refining hub). California prices are inflated by policy-driven refining capacity constraints and higher taxes. The Great Lakes recently spiked due to Western Canadian crude disruptions affecting regional plants. Geography and infrastructure infrastructure matter more than crude price alone.

What specific crude types matter for diesel supply?

Heavy crude yields more diesel per barrel than light crude. Iran produces roughly 55 percent heavy crude, and Venezuela, Russia, and Canada are major heavy-crude producers. Refineries cannot easily swap between crude types; a plant designed to process heavy crude cannot simply shift to light crude without significant modification. This means supply disruptions in heavy-crude exporting nations directly squeeze diesel markets, while light-crude disruptions may have less impact on diesel supply.

How quickly do wholesale diesel prices now move, and what does this mean for fuel surcharges?

The wholesale diesel rack (the price point at which carriers and independent operators buy fuel) has historically reset once daily around 5 to 6 p.m. Volatility has accelerated dramatically since March 2024, cooling briefly in June and July but roaring back in August and September with no real settlement. This 8-month stretch is described as the most volatile in at least 15 years by GasBuddy's analyst. The implication is that fuel surcharges tied to daily or weekly averages now lag behind spot price movements, squeezing carrier margins on fixed-price contracts and requiring more frequent surcharge resets to match reality.

What role does China's refining strategy play in global diesel shortages?

China has overtaken the United States as the world's largest refiner but has deliberately throttled some refining output to protect its own crude access and strategic reserves. This capacity pull removes diesel availability from an already tight global market. De Haan identifies China as an underappreciated wild card because its refining policy decisions cascade to global wholesale prices and carrier costs worldwide, not just within China.

Procurement

High Impact

Diesel Prices Hit Records as Refining Capacity Crunch Outpaces Oil Supply

Oct 27, 2026

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The signal

Diesel prices have reached record levels in 2024, exceeding the 2022 high of $5.81 per gallon and climbing to approximately $6.35 per gallon, while gasoline remains roughly 70 cents below its 2022 peak. This divergence marks a structural shift: the fuel spike is driven not by crude oil scarcity but by a critical loss of refining capacity globally.

Russia's reduced diesel exports (due to Ukrainian drone attacks on refineries), China's throttled refining output to protect reserves, and the shift of the United States from world's largest refiner to second behind China have compressed supply precisely when geopolitical tensions near the Strait of Hormuz and broader sanctions regimes are tightening crude availability. For trucking operations whose single largest variable cost is diesel, this represents not a temporary market fluctuation but a multi-year structural challenge that requires strategic rethinking of fuel surcharge mechanisms, fleet timing, and route optimization.

The decoupling of diesel and gasoline economics also exposes how little fuel prices track headline crude prices, demanding that supply chain professionals understand refining geography, crude type differentiation, and regional infrastructure constraints.

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What This Means for Your Supply Chain

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What if Russian diesel exports decline another 15 percent due to intensified drone attacks?

Simulate a scenario in which Russian diesel exports fall from current levels by an additional 15 percent over the next 6 months due to expanded Ukrainian drone campaigns. Model the resulting price impact on U.S. diesel across regions tied to Gulf Coast and international pricing, and project the operational cost increase for a fleet of 500 tractors across North America with an average monthly fuel consumption of 15,000 gallons per tractor.

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What if China further reduces refining output to bolster domestic reserves during geopolitical tensions?

Simulate a global refining capacity constraint scenario where China throttles refining output by an additional 10 percent to protect domestic crude reserves amid regional tensions. Model the cascade effect on global diesel pricing, NYMEX contract volatility, and regional price spreads across North America. Project the impact on carrier fuel costs, surcharge adjustments required, and the competitive pressures on carriers in lanes dependent on fixed-price fuel terms.

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strategic

What if California refining capacity further tightens due to environmental policy shifts?

Simulate a regional sourcing scenario where California refining capacity declines by 8 percent due to new environmental regulations or plant closures. Model the resulting diesel price premium in California, impacts on West Coast logistics operations, and strategic sourcing decisions for carriers operating Port of Los Angeles and Port of Long Beach services. Include the cost of rerouting fuel sourcing from Gulf Coast and the operational implications of higher fuel costs on specific freight lanes.

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