Diesel Prices Surge to Record Highs Amid Global Supply Concerns and Potential US Export Ban
A confluence of refining costs, geopolitical tensions, and possible U.S. export restrictions is driving diesel prices to unprecedented levels, impacting businesses and consumers.
Diesel prices have reached historic highs, nearing £2 a liter in Britain, creating significant financial strain for consumers and businesses that rely on commercial vehicles, haulage, and heavy machinery.
The surge is attributed to a combination of factors, including the refining process, environmental regulations, low yields, and robust global industrial demand. However, recent geopolitical events and potential policy changes have amplified these pressures.
Factors Driving Up Diesel Costs
The price disparity between diesel and gasoline begins before taxes. Diesel refining is inherently more costly than that of gasoline due to diesel's heavier molecular structure and longer hydrocarbon chains, requiring a more intensive refining process. Additionally, stringent environmental regulations mandate the removal of contaminants like sulfur, nickel, and vanadium, further increasing production costs. This process also results in less diesel being produced per barrel of crude oil compared to gasoline.
Demand for diesel extends beyond passenger vehicles, encompassing public transportation, delivery trucks, agricultural machinery, boats, and generators, leading to widespread industrial consumption. Seasonal factors also play a role, as the heating oil used during colder months is derived from similar components as diesel, increasing demand and retail prices.
Geopolitical Influences and Supply Chain Disruptions
Diesel's vulnerability to geopolitical instability is a significant contributing factor. Many countries, including the UK, rely heavily on diesel imports, as domestic production often falls short of consumption. This dependence makes diesel prices extremely sensitive to international supply chain disruptions and conflicts.
The conflict in Iran has been a notable catalyst for price volatility. Following the conflict's outbreak, diesel prices saw a sharp increase, mirroring trends seen during the Russia-Ukraine invasion. While prices temporarily receded following a U.S.-Iran framework deal in June, renewed tensions have caused prices to climb again.
Further exacerbating the situation, Russia, once a major supplier of diesel to the UK and Europe, banned exports in the summer. This action, coupled with limited refining capacity unable to quickly fill the supply gap, has tightened global availability. The U.S. has become a crucial supplier, accounting for approximately a third of UK diesel imports.
Potential U.S. Export Ban
Recent indications from U.S. President Trump regarding a potential ban on U.S. diesel exports have sent shockwaves through global markets. The suggestion, seen as an effort to keep domestic U.S. fuel costs down and bolster support ahead of midterm elections, has contributed to market instability. Should the U.S. implement such an export ban, diesel prices are expected to climb further and more rapidly.
Simon Williams, head of policy at the RAC, stated, "With concerns over the global supply of wholesale diesel, the question facing drivers is 'how far above £2 a litre will it climb?" He added that "only a sudden and sustained drop in the cost of oil can prevent an average diesel pump price of over £2 a litre happening, which sadly appears highly unlikely."
The Energy & Climate Intelligence Unit estimates that petrol and diesel vehicles have incurred approximately £1.7 billion in extra running costs collectively within the first 100 days of the Iran conflict.
Impact on Consumers and Businesses
The escalating cost of diesel is placing a significant burden on households and businesses. The RAC reported that the average price of a liter of diesel reached 199.18 pence, the highest in UK history. Filling an average family car now costs nearly £110, an increase of £31 since the start of the U.S.-Iran conflict.
While diesel vehicles traditionally offer better fuel economy than their petrol counterparts, the widening price gap is eroding this cost advantage. Analysis indicates that diesel drivers could face an additional £435 annually to fill their vehicles if prices reach £2 per liter, compared to the pre-conflict period. Despite this, some diesel cars still maintain a lower annual running cost than equivalent petrol models due to their superior miles per gallon, though the overall increase in expenditure remains substantial.
Tax and Fuel Prices
Fuel duty remains at 52.95 pence per liter for both unleaded and diesel, with an additional 20% VAT applied. This means approximately 86 pence of every liter of diesel is tax. However, as diesel prices have risen, the tax component has fallen as a percentage of the total cost, now accounting for about 43%, down from around 54% when diesel was priced at 142.2 pence per liter in February.