Crude Oil Prices Fall But Diesel Stays Expensive As Diesel Crack Hits $93: Inside The Oil Market’s Tug Of War

India is facing a widening gap between crude oil and diesel prices, with the country’s crude basket averaging around $112 a barrel this month while the diesel benchmark has averaged about $167. The roughly $55 difference comes even as Brent crude, which had moved above $100 during the recent supply disruption, has eased from its highs, settling at $103.08 a barrel on September 23.

The key pressure point is now the global diesel market. The US diesel crack, which measures the premium of diesel over the crude used to produce it, remains around $93 a barrel, well above the more typical $30-$40 range. The spread had touched a record $118.62 on September 14 as tight refined-product supplies pushed diesel prices higher even as the crude market began to adjust.

US distillate inventories stood at about 107.4 million barrels in the week ended September 18, while refinery utilisation was around 94%. Distillate stocks fell by 428,000 barrels during the week and were about 12% below the five-year average, even as refiners continued to operate at high utilisation.

The Diesel Shortage Has Moved Down The Oil Chain

The divergence between crude and diesel prices reflects a change in where the oil market is facing its biggest constraint. Crude supplies can adjust when disrupted cargoes are redirected or alternative grades become available. Refined products are harder to replace because they depend on functioning refineries, the right crude inputs and available transport routes.

A refinery that is offline cannot be replaced quickly. Even when a plant is operating, the amount of diesel it can produce depends on its configuration and the type of crude being processed. This makes the refined-products market more vulnerable when specific crude grades or processing capacity become unavailable.

The impact is particularly important for middle distillates such as diesel and jet fuel. These products depend heavily on suitable crude grades and available refining capacity, so a disruption further up the supply chain can have a larger effect on their availability than the headline change in crude supply suggests.

That helps explain why Brent and diesel are moving differently. The crude market can start pricing a recovery in supply before the physical diesel market has had enough time to rebuild inventories.

The diesel crack is showing that difference clearly. At around $93 a barrel, the spread remains far above its usual range, indicating that the market is placing a substantial premium on available diesel relative to its crude feedstock.

Refinery Disruptions Keep Diesel Supplies Tight

The physical supply of refined products is facing several constraints at the same time. Refinery disruptions in Russia and West Asia have reduced available processing capacity, while restrictions on product exports have tightened supplies in key markets. Shipping disruptions add another layer because crude and finished products do not always face the same logistical constraints.

A crude cargo can sometimes be redirected to another buyer if the economics work. Diesel has to reach the market where it is needed. When inventories are already low, that difference becomes more important.

There is also a timing problem. Even when a refinery returns to operation, its additional output first has to replace the supply that was lost. Inventories then need to rise consistently above consumption before the market rebuilds a comfortable buffer.

That is why high refinery utilisation alone has not been enough to ease diesel prices. US refineries were running at around 94% of capacity in the latest week, yet distillate stocks continued to fall.

The market is therefore dealing with a shortage of available refined products rather than simply a shortage of crude. Reuters has reported that the global diesel shortage could extend into 2027, with refinery disruptions, depleted inventories and reduced product flows continuing to weigh on supply.

This also explains why the diesel crack can remain elevated after the initial crude-supply shock begins to fade. The market needs functioning refineries, adequate crude grades, open product routes and time to rebuild inventories before the pressure can ease materially.

India Sits At The Centre Of The Oil Market’s Tug Of War

The divergence is particularly important for India because the country is both a major crude importer and a large refining centre. When crude prices ease, Indian refiners can benefit from lower feedstock costs and the country's oil import bill can come under less pressure.

But strong international diesel prices create a different dynamic. Indian refiners can sell products into a tight global market, supporting product realisations and refining margins even when the cost of crude begins to moderate.

That creates a gap between the benefit of cheaper crude and the cost of refined products. The roughly $55 difference between India's crude basket and diesel benchmark captures that divergence.

The impact also extends beyond refiners. Diesel is closely linked to road freight, construction, agriculture and industrial activity. If international diesel prices remain elevated for an extended period, higher fuel costs can feed into transportation and operating expenses even if domestic pump prices do not immediately move in line with global benchmarks.

For India, therefore, a softer crude price does not by itself mean that fuel-market pressure has disappeared. The benefit of cheaper crude depends partly on how quickly international refined-product supplies recover.

The next signal will come from the relationship between the diesel crack, inventories and refinery and product flows. A sustained decline in the crack alongside rising inventories and improving refinery output would provide stronger evidence that the physical diesel shortage is easing.

A lower crack on its own would be less conclusive because it could also result from weaker demand. Similarly, high refinery utilisation would not necessarily mean the market is loosening if inventories continue to decline.

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