Regan Brown
Diesel fuel prices have been a concern for consumers, with prices higher than gasoline due to the refining process and molecular makeup of the product. In the UK, diesel prices averaged 143.3 pence per liter on January 6, 2025, while in the US, diesel prices averaged $3.57 per gallon in June 2025. While travel prices, including airfares and hotel rates, have decreased compared to the previous year, fuel prices remain elevated due to the conflict between Israel and Iran and the subsequent impact on oil prices.
| Characteristics | Values |
|---|---|
| Diesel prices in the UK | £1.433 per litre |
| Petrol prices in the UK | £1.366 per litre |
| Diesel prices in the US | $3.57 per gallon |
| Gas prices in the US | $3.17 per gallon |
| Gas prices in the US one year ago | $3.447 per gallon |
| Gas prices in the US one month ago | $3.207 per gallon |
| Gas prices in the US in December | $2.89-$3 per gallon |
| WTI crude oil price | $73 per barrel |
| Travel prices | Down vs. last year |
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What You'll Learn
- Diesel prices are influenced by the cost of crude oil
- Diesel prices are higher than gasoline due to refining processes
- Diesel prices are projected to increase due to the Middle East conflict
- Diesel prices are cheaper in countries that produce more crude oil
- Diesel prices are influenced by the blend of gasoline used in different seasons
Diesel prices are influenced by the cost of crude oil
Diesel fuel prices are influenced by a variety of factors, with the cost of crude oil being a significant driver. Crude oil prices are determined by the worldwide demand for and supply of crude oil, which is influenced by global economic conditions. Diesel fuel, as a major transportation fuel, tends to follow these economic trends.
The relationship between crude oil and diesel fuel prices is complex and dynamic. While crude oil prices are a primary factor in diesel prices, other factors also come into play. For instance, the production of diesel fuel incurs refining costs, which can vary seasonally and by region. Additionally, distribution and marketing costs are included in the retail price of diesel fuel, and these can be influenced by factors such as distance from the source of supply, with areas farther from production centres like the Gulf Coast typically experiencing higher prices.
The interplay between diesel fuel and heating oil demand further complicates the pricing landscape. As heating oil and diesel fuel are practically the same products, fluctuations in the demand for heating oil during colder months can exert pressure on diesel fuel prices. Regional variations in demand, such as seasonal swings in farmers' diesel fuel requirements, can also influence local diesel fuel prices.
Market conditions and competition among independent retailers also shape diesel prices. Retail stations set prices based on local market dynamics and the need to cover replacement costs. When supply falls relative to demand, upward pressure on prices can result. Additionally, diesel fuel prices can be influenced by broader geopolitical events, such as conflicts in oil-producing regions, which can cause uncertainty and impact oil prices globally.
While diesel fuel prices are influenced by these diverse factors, the cost of crude oil remains a pivotal determinant. Crude oil prices can exert a ripple effect on the downstream costs associated with refining, distributing, and marketing diesel fuel. Understanding the interplay between crude oil prices and these additional factors is essential for comprehending the broader dynamics of diesel fuel pricing.
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Diesel prices are higher than gasoline due to refining processes
Diesel fuel prices have been higher than gasoline prices almost continuously since September 2004. This is a break from the previous historical pattern, where diesel fuel prices were usually lower than gasoline prices, except during cold winters when demand for heating oil was high.
There are several reasons why diesel fuel prices are higher than gasoline prices due to refining processes. Firstly, diesel fuel production and distribution costs have been affected by the transition to less polluting, lower-sulfur diesel fuels. In 2006, the U.S. began to phase in ultra-low-sulfur diesel (ULSD) due to environmental safety concerns. As a result, refineries had to invest significant capital in new equipment to remove sulfur from the fuel, increasing the cost of producing diesel.
Secondly, diesel has a higher energy density and better combustion efficiency than gasoline, which means it contains more energy per gallon. Diesel engines produce more power per gallon of fuel, resulting in better fuel economy. This higher energy density makes diesel a preferred fuel for industries such as trucking, shipping, farming, and marine vessels, driving up the demand and price.
Thirdly, diesel fuel is subject to higher taxes. The federal excise tax for on-highway diesel fuel is 24.3 cents per gallon, which is 6 cents per gallon higher than the tax on gasoline. These higher taxes contribute to the higher price of diesel fuel.
Finally, supply and demand challenges also play a role in the higher prices of diesel. Civil wars, trade sanctions, political conflicts, and refinery shutdowns can all impact the fuel supply, leading to increased prices. For example, the International Maritime Organization's (IMO) decision in 2020 to mandate the use of very low-sulfur fuel oil (VLSFO) reduced the amount of distillate components available for diesel production, further increasing diesel prices.
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Diesel prices are projected to increase due to the Middle East conflict
Diesel prices are not coming down; instead, they are projected to increase due to the Middle East conflict. The conflict between Israel and Iran has resulted in sharp swings in oil prices, with Brent crude oil prices hitting a five-month high of $81 per barrel after the US bombed Iranian nuclear sites. While a ceasefire has been agreed upon, oil prices remain elevated, and diesel prices are expected to rise as a result.
The Middle East conflict has undone the impact of tariffs on energy markets, pushing prices back up. The biggest concern for British households is a potential rise in liquefied natural gas (LNG) prices. While the UK primarily procures its LNG from Norway, any blockade in the Strait of Hormuz would cause a global surge in LNG prices. The Strait of Hormuz is a critical shipping route for oil and gas, with about a fifth of global oil supplies traversing through it.
The conflict has already led to a surge in crude oil prices, with diesel futures gaining about 8% in a single day, their biggest increase since April 2022. Analysts predict that the conflict's most significant impact will be on the supply of medium heavy-sour crude grades, which are crucial for distillate fuel production. Existing diesel inventories are already low, and the conflict is expected to reduce Middle Eastern diesel exports and global production.
The US diesel inventories stood at 108.9 million barrels in the first week of June, about 15% below the five-year average. This shortage, combined with rising crude oil prices, is projected to cause a 10 to 30 cents per gallon increase in retail diesel prices in the US. The national average price of diesel in the US is currently $3.57 per gallon, and it is expected to rise further in the coming days.
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Diesel prices are cheaper in countries that produce more crude oil
As of June 27, 2022, the average regular gas price in the U.S. was $3.207 per gallon, down from $3.447 a year prior. However, diesel fuel prices have been higher than gasoline prices and are expected to rise further. Diesel fuel prices are influenced by various factors, including production and distribution costs, taxes, supply and demand dynamics, and energy content.
Diesel prices are generally cheaper in countries that produce more crude oil due to lower transportation costs and a more stable supply. Countries with higher crude oil production can more easily meet the demand for diesel fuel, driving down prices. Additionally, transportation costs are typically lower due to reduced distances between the source of supply and retail locations. This is particularly evident in the U.S., where areas farther from the Gulf Coast, a major hub for diesel fuel production, tend to have higher diesel prices.
Furthermore, countries with higher crude oil production may have a more stable supply, which can help regulate diesel prices. When refinery outages occur, it becomes more challenging and costly to transport diesel fuel over long distances, impacting regions with limited interconnectivity and reliance on external sources, such as California in the U.S.
Demand for diesel fuel also plays a role in pricing. Countries with a higher proportion of diesel engine cars and a strong agricultural sector will generally experience higher demand for diesel fuel. This increased demand can lead to higher diesel prices. However, in countries with abundant crude oil production, the supply can more easily meet this demand, preventing significant price increases.
Additionally, the cost of producing diesel fuel can be influenced by refining requirements and the type of crude oil used. Countries with access to lower-sulfur ("sweet") crude oils may benefit from reduced refining costs, making diesel production more cost-effective and potentially leading to lower diesel prices for consumers.
In summary, diesel prices tend to be cheaper in countries that produce more crude oil due to reduced transportation costs, a more stable supply, and the ability to meet demand more efficiently. These factors collectively contribute to more competitive pricing in countries with higher crude oil production.
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Diesel prices are influenced by the blend of gasoline used in different seasons
Diesel prices, like gasoline prices, are influenced by a multitude of factors, including the conflict between Israel and Iran, the weather, and the blend of gasoline used in different seasons.
While diesel prices are influenced by broader geopolitical issues, such as the conflict between Israel and Iran, which can cause elevated oil prices, there are also more localised factors at play. For instance, diesel prices are influenced by seasonal changes in refinery capacity, fuel blends, and other factors that can raise or lower the price of fuel.
In the spring, refineries change over to a fuel mix that is less likely to vaporize as temperatures increase during the summer months. This fuel blend is mandated by the U.S. Energy Information Administration and is also more expensive to produce, which can raise prices by a few cents at a minimum. The increase in cost from switching to summer-blend fuels can be as high as fifteen cents per gallon.
Conversely, in the fall, the gasoline blend is adjusted again. The diesel fuel is winterized with additives to prevent gelling at low temperatures. This adjustment also accounts for the increased demand for heating oil during the winter, which has a similar composition and formulation to diesel.
These seasonal adjustments in fuel blends can have a significant impact on the overall costs of moving goods to market, affecting both shippers and carriers. Therefore, understanding these regional and seasonal trends is essential for planning and budgeting purposes.
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Frequently asked questions
Diesel fuel prices are influenced by several factors, including the cost of crude oil, supply and demand, local market conditions, and economic trends. While it is challenging to predict future price movements, diesel fuel prices may come down if crude oil prices decrease, demand decreases, or local market conditions improve.
Diesel fuel prices are primarily determined by the cost of crude oil, which accounts for about 50% of the retail price. Other factors include supply and demand, local market conditions, taxes, and economic trends.
Crude oil prices directly impact diesel fuel prices because diesel fuel is refined from crude oil. When crude oil prices rise, diesel fuel prices tend to increase, and when crude oil prices fall, diesel fuel prices may decrease.
Diesel fuel prices are sensitive to changes in supply and demand. High demand for diesel fuel, especially in the transportation and commercial sectors, can lead to increased prices. Similarly, if there are supply disruptions or refinery problems, diesel fuel inventories may decline, resulting in higher prices.
Yes, local market conditions can significantly influence diesel fuel prices. Factors such as the location and ownership of retail outlets, competition, and regional supply issues can affect diesel fuel prices in specific regions or states. For example, diesel fuel prices on the West Coast, particularly in California, tend to be higher due to taxes and supply issues.
