Rajan Wilcox
The cost of car fuel has risen significantly over the years, with the average cost of filling a car with diesel being £80 and £76 for petrol. The introduction of E10 fuel in the UK in September 2021 has also impacted fuel prices, as ethanol is more expensive than petrol. E10 fuel, also known as biofuel, has a higher ethanol content than regular petrol, and its price can influence between 6% and 8% of the cost of petrol and diesel. The price of fuel is influenced by various factors, including the cost of crude oil, refining processes, fuel duty, VAT, and delivery costs. These factors, along with rising inflation and energy costs, have led to higher fuel prices and adjustments in driving habits for many motorists.
| Characteristics | Values |
|---|---|
| Average price of unleaded petrol in the UK | 137.39p per litre (as of March 2025) |
| Average price of diesel in the UK | 144.14p per litre (as of March 2025) |
| Percentage of the cost that is tax at 120p per litre | 65% |
| Percentage of the cost that is tax at £1 per litre | 75% |
| Percentage of pump fuel prices made up of retailer profit | 5% to 10% |
| Percentage of the cost of petrol and diesel influenced by E10 | 6% to 8% |
| Highest average price of petrol per litre in the UK | 191.5p (on 3 July 2022) |
| Highest average price of diesel per litre in the UK | 199.09p (on 25 June 2022) |
| Most expensive region in the UK to purchase petrol | Isle of Wight, up to 150.6p per litre |
| Cheapest place in the UK to buy fuel | Northern Ireland, 139.1p for petrol and 148.1p for diesel (as of 2024) |
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What You'll Learn
E10 fuel cost influenced by ethanol content
The cost of E10 fuel is influenced by its ethanol content. E10 fuel is a blend of petrol and ethanol, with the latter making up approximately 10% of its volume. Ethanol is more expensive than petrol, and its inclusion in E10 fuel contributes to its cost. The energy content of ethanol is about 33% less than that of pure gasoline, which can lead to a slight decrease in fuel economy. This reduction in fuel efficiency may also contribute to the overall cost of using E10 fuel.
The adoption of E10 fuel as a standard in various regions is driven by its environmental benefits. By substituting a portion of petroleum with ethanol, a renewable source, net carbon emissions can be reduced. Ethanol has a positive impact on tailpipe CO and HC emissions, and it does not seem to influence benzene and 1,3-butiene emissions. However, its impact on NOx emissions is contradictory, and it may increase ozone-forming potential due to increased evaporative and acetaldehyde emissions.
The compatibility of E10 fuel with vehicles depends on their technology and material composition. Modern cars with closed-loop fuel control systems can compensate for the leaning effect of ethanol, and they are often built with materials that tolerate ethanol's corrosive nature. Older cars, on the other hand, may require special treatments or be restricted to lower-ethanol fuels like E5.
The cost of E10 fuel at the pump is influenced by various factors beyond just ethanol content. Taxes and duties on fuel contribute significantly to the overall cost. In the UK, for instance, fuel duty and VAT raise a significant amount of revenue for the government. Additionally, wholesale prices of crude oil impact the cost of E10 fuel, and these prices can fluctuate due to market dynamics and supply chain constraints.
Regional variations in E10 fuel prices can also occur due to differences in distribution and retail networks. Supermarkets, despite having a smaller number of forecourts, account for a significant portion of total fuel sales and can influence price changes. Local regulations and standards, such as the Renewable Fuel Standard in the United States, can also impact the availability and cost of E10 fuel in specific regions.
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E10 fuel price vs. vehicle compatibility
The price of E10 fuel is influenced by its composition, which includes up to 10% ethanol by volume, making it a greener alternative to standard petrol. This higher ethanol content contributes to increased production costs, resulting in a slightly higher price for consumers compared to E5 fuel. While the exact price difference can vary over time and across different regions, it is generally expected that E10 fuel will be marginally more expensive than E5.
Regarding vehicle compatibility, E10 fuel is not universally compatible with all vehicles. It is estimated that around 3% of vehicles, approximately 600,000 cars in the UK, are not compatible with E10 fuel. The incompatibility is particularly relevant for older cars, with drivers of vehicles registered before 2002 generally advised against using E10 fuel. This is due to potential issues with seals, plastics, and metals in these older models, which may be damaged over time by the higher bioethanol content in E10.
To address this concern, the European Automobile Manufacturers' Association (ACEA) has compiled an E10 vehicle compatibility checklist. This list assists consumers in determining whether their petrol vehicle can safely use E10 unleaded petrol or if they should continue using E5 unleaded petrol. It is recommended that drivers consult this checklist or use the government's online checker to ensure their vehicle is compatible with E10 fuel before making the switch.
It is worth noting that while E10 fuel may offer environmental benefits and is becoming the standard grade at forecourts across the UK, it is also less efficient than E5 fuel. This means that drivers with E10-compatible cars may experience a slight decrease in miles per gallon when using E10 fuel compared to E5. However, the availability of E5 fuel may become more limited as E10 becomes the new standard.
In summary, while E10 fuel prices may be slightly higher due to the increased cost of ethanol, the primary consideration for drivers is vehicle compatibility. It is crucial to check if your vehicle is compatible with E10 fuel before using it to avoid potential damage to older models and to prepare for any changes in fuel efficiency.
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Fuel tax and government influence
Fuel tax plays a significant role in the overall cost of fuel for consumers. In the UK, fuel duty and VAT on fuel, along with vehicle and 'showroom' taxes, contribute more than £40 billion annually to the government's revenue. At £1 per litre, 75% of the cost goes to the Treasury. This high tax rate has a noticeable impact on the pump price of fuel.
The government's influence on fuel prices extends beyond taxation. The UK's transition to E10 fuel in September 2021 has also contributed to rising fuel prices due to the higher cost of ethanol compared to petrol. This move towards greener fuel aligns with the government's efforts to reduce carbon emissions and encourage the adoption of more fuel-efficient vehicles.
In the United States, motor vehicle fuel taxes are considered "user taxes," with federal and state governments setting tax rates to cover road-building costs. While US fuel taxes are generally lower than in Europe and Japan, they still impact fuel prices and can vary across states and localities.
Government policies and subsidies can also influence fuel prices and the demand for more fuel-efficient vehicles. For example, tax credits for hybrid vehicles have been shown to increase sales and contribute to reductions in greenhouse gas emissions. However, the effectiveness of fuel economy taxation as an incentive for gasoline conservation varies across vehicles and is challenging to implement due to the complex relationship between fuel economy and gasoline consumption.
Additionally, governments may use fuel taxes as a tool to discourage the use of certain fuels and reduce negative externalities, following the "polluter pays" principle. Higher fuel taxes can incentivize a shift towards more environmentally friendly alternatives and help address the social costs imposed on non-users. However, the decision to increase fuel taxes is complex and politically sensitive, especially in times of high energy prices.
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Fuel prices and inflation
Several factors influence the price of fuel, and these factors also play a role in shaping inflationary trends. The cost of crude oil, which is used to make petrol, is a major contributor to the overall cost of fuel. When the price of crude oil increases, inflation can be impacted as fuel prices rise to pass on the additional cost to consumers. Similarly, when the price of crude oil decreases, there is downward pressure on inflation as fuel prices should, ideally, become more affordable for consumers.
Fuel duty and taxes are other significant components of fuel prices. In the UK, fuel duty is currently 52.95 pence per litre, and drivers also pay a 20% VAT rate. These two elements make up a substantial portion of the price of petrol and diesel. Changes in fuel duty and taxes can have a direct impact on inflation. When fuel duty or taxes increase, inflation may rise as fuel prices are adjusted upwards. Conversely, when fuel duty or taxes are reduced or frozen, inflation can be mitigated to some extent as fuel prices become more stable or affordable.
Market dynamics, such as competition and regional variations, also influence fuel prices and, by extension, inflation. Areas with multiple petrol stations, particularly those with supermarket forecourts, often experience lower petrol prices due to increased competition. In contrast, remote locations with fewer stations tend to have higher prices as they sell less volume but still need to cover their overheads. These disparities in fuel prices across different regions can contribute to variations in inflation rates within a country.
The introduction of new fuel types can also impact fuel prices and inflation. For example, the UK's transition to E10 petrol in September 2021 influenced fuel prices as ethanol, a component of E10, is more expensive than petrol. This change in fuel composition contributed to a rise in fuel prices, which, in turn, had a ripple effect on inflation.
In summary, fuel prices and inflation are intricately connected. Changes in fuel costs, influenced by factors such as crude oil prices, fuel duty, taxes, market dynamics, and fuel type, can have a direct impact on inflationary trends. Understanding this relationship is crucial for policymakers and economists when making decisions that affect the cost of living and overall economic health of a country.
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Fuel efficiency and cost-saving
Servicing and Maintenance: Regular servicing and proper maintenance of your vehicle can improve fuel efficiency. This includes ensuring your tyres are at the correct pressure and that all components are in good working order.
Driving Habits: Gradual changes in speed and maintaining a consistent speed where possible can reduce fuel consumption. Anticipating the road ahead and driving smoothly can also help. Harsh acceleration, sudden stops, and erratic driving use more fuel. Removing unnecessary items like roof racks and clearing out the boot can reduce weight and improve fuel efficiency. Using air conditioning can also increase fuel usage, so dressing for the weather and using AC sparingly can help save fuel.
Fuel Calculators and Price Comparison: Using a fuel calculator can help you understand your fuel costs and plan your journeys efficiently. Additionally, comparing fuel prices in your area can lead to significant savings over time. Prices can vary even between neighbouring towns, and areas with more petrol stations or supermarket forecourts often have lower prices due to increased competition.
Alternative Fuels: With the introduction of E10 fuel in the UK, motorists have an alternative fuel option. E10 has a higher ethanol content, which is more expensive than petrol, but it may be more cost-effective for vehicles compatible with this fuel type.
Reducing Car Usage: When possible, consider alternative modes of transportation or reduce non-essential car usage. Many drivers are already adopting this approach to keep costs down.
While some factors influencing fuel prices, such as wholesale oil prices and inflation, are beyond individual control, motorists can take proactive measures to improve fuel efficiency and manage their fuel costs through informed choices and driving habits.
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Frequently asked questions
The cost of E10 fuel in the UK depends on various factors, including the price of crude oil, refining costs, fuel duty, VAT, and delivery charges. The price of E10 fuel was impacted when it was introduced in England, Scotland, and Wales in September 2021, as ethanol is more expensive than petrol.
The price of E10 fuel is influenced by the cost of crude oil, which forms a significant portion of the overall fuel cost. Additionally, the refining process to turn crude oil into fuel contributes to the final price. Fuel duty, VAT, and delivery charges also play a role in determining the price of E10 fuel.
E10 fuel prices can vary significantly across different regions in the UK. For example, Northern Ireland has the lowest fuel prices, with an average of 139.1p for petrol and 148.1p for diesel as of 2024. In contrast, the Isle of Wight is the most expensive region, with petrol prices peaking at 150.6p.
