Diesel surge signals fresh wave of global inflation

The diesel price surge has implications beyond the energy market.

Diesel markets are sending signals of a fresh wave of global inflationary pressure, with fuel prices surging to record levels and inventories declining as US refineries operate near full capacity amid continued supply disruptions in the Middle East and Russia.

The diesel price surge has implications beyond the energy market, as the fuel is essential for trucking, goods transportation, agricultural and construction equipment, as well as heating.

Higher diesel prices can therefore gradually feed through to food, shipping and manufacturing costs, and ultimately to consumer prices for goods and services.

Diesel tops $6

The average US diesel price topped $6 a gallon for the first time in September, compared with about $3.7 a year earlier, underscoring intensifying pressure in the refined-products market.

The increase came as US distillate inventories, including diesel and heating oil, fell to seasonally record-low levels, reducing the market’s ability to absorb further supply disruptions.

The low inventory levels are becoming increasingly significant as seasonal demand picks up, with the Northern Hemisphere entering the heating season while diesel consumption rises in agricultural activity and crop transportation.

Global supplies are also under pressure, with oil-product flows from the Middle East disrupted, Russian supplies declining, and a number of refineries and energy infrastructure facilities affected.

Diesel margins at record levels

The supply crunch has become increasingly evident in refining margins, with the US diesel crack spread—the premium of diesel over crude—topping $106 a barrel in early September, marking a record high and surpassing $100 a barrel for the first time.

The scale of the jump is stark compared with historical levels, with the spread typically hovering around $20 a barrel before recently surging above $100, underscoring exceptional tightness in the diesel market relative to crude.

Higher diesel prices can quickly feed through to the real economy, raising trucking costs and the expense of transporting goods and raw materials, while also increasing farming, harvesting, construction and logistics costs that can ultimately be passed on to food, industrial and retail prices.

Refineries operating near full capacity

US refiners, meanwhile, have limited room to boost output, with utilization rates reaching about 98%, the highest level since 2000.

Utilization has also remained above 95% for 12 consecutive weeks, the longest such stretch since 1997-98, pointing to limited spare capacity to offset any further supply shortfall.

Some refiners have postponed planned maintenance to sustain production, but operating at such high rates increases the likelihood of deferred work being carried out before winter, while also raising the risk of unplanned outages.

The diesel market, therefore, faces a difficult combination of low inventories, refineries operating near full capacity, global supply disruptions and elevated seasonal demand, factors that could keep prices under pressure unless supplies improve.

Chemicals add another inflation warning

Inflationary pressure is not limited to diesel, with the chemicals market showing similar strains. The ICIS Global Chemical Price Index (IPEX) has risen about 41% since the start of the year, while prices on the US Gulf Coast have climbed 44%, compared with increases of 33% in Northwest Europe and 26% in Northeast Asia.

Chemical prices are closely watched as an early indicator of production costs because chemical products are used in about 96% of manufactured goods globally and sit at early stages of many value chains, allowing higher costs to filter through to a broad range of industrial and consumer sectors.

Some of the pressure is already showing up in inflation data, with inflation rising by about 0.4% in Japan through July, 1% in the US and 1.6% in the euro area through August since the end of February, according to data cited by ICIS. Official data from several European countries also identified higher energy and petroleum-product prices as key drivers of inflation in recent months.

Two signals are emerging at the same time: elevated diesel prices, whose effects quickly spread through transportation, agriculture and logistics, and higher chemical prices, which feed through industry and production chains. If supply disruptions and low inventories persist, these pressures could gradually translate into broader increases in production costs and prices for goods and services globally.