
The price of diesel fuel at the pump is influenced by various factors, including wholesale fuel prices, global crude oil prices, and the dollar-to-sterling exchange rate. Fuel duty, charged by governments per litre, also impacts the pump price. In the UK, initiatives like Fuel Watch by RAC monitor diesel prices to ensure fairness for consumers, and apps like myRAC help drivers find the cheapest fuel options. Understanding these factors and staying informed about price variations can help consumers make informed choices and save money when filling up their vehicles with diesel fuel.
| Characteristics | Values |
|---|---|
| Price determinants | wholesale fuel prices, global price of crude oil, VAT, oil price, dollar-to-sterling exchange rate |
| Factors leading to price rise | high oil prices, weak pound |
| Factors leading to price fall | fall in inflation, wholesale price dip |
| Government intervention | fuel duty frozen at 57.95p per litre, cut to 52.95p in 2022 |
| Tools for finding cheaper fuel | Fuel Finder feature in the myRAC mobile app, visiting cheaper forecourts |
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What You'll Learn

How do pump prices differ across retailers?
The price of diesel fuel at the pump is influenced by several factors, including the global price of crude oil, the dollar-to-sterling exchange rate, and fuel duty charges. These factors can vary across retailers, leading to differences in pump prices.
One factor that influences pump prices is the wholesale fuel cost, which is the price retailers pay for the fuel. Retailers may have different wholesale costs due to variations in their supply chains or negotiated rates with suppliers. As a result, the pump prices they set can differ. For example, supermarkets like Asda, Tesco, and Sainsbury's may have different wholesale costs and, therefore, different pump prices compared to independent forecourts or smaller retailers.
Another factor contributing to price differences across retailers is competition. Retailers monitor market trends and their competitors' pricing to stay competitive. As a result, they may adjust their pump prices accordingly. For instance, if one retailer lowers their prices, others may follow suit to maintain their market share. This competition can lead to variations in pump prices across different retailers, even within the same geographical area.
Geographical location can also play a role in pump price differences. Retailers in different regions or cities may have varying operating costs, taxes, or local regulations that influence their pricing strategies. For example, fuel prices in urban areas may be higher due to higher rent or operating costs for retailers. Additionally, retailers in remote or rural areas with limited competition may have higher pump prices due to reduced pressure to keep prices low.
Furthermore, the availability and demand for fuel can impact pump prices across retailers. In areas with limited fuel supply or during times of high demand, retailers may increase their prices. Conversely, retailers in areas with an excess fuel supply or lower demand may decrease their prices to remain competitive. This dynamic can result in pump price variations across retailers, with prices fluctuating based on local supply and demand conditions.
Finally, the business model and pricing strategy of each retailer can lead to pump price differences. Some retailers may prioritize profit maximization and set higher prices, while others may focus on attracting customers with competitive pricing. Additionally, retailers offering additional services, rewards programs, or loyalty benefits may have slightly higher pump prices to offset those costs. These strategic differences contribute to the variation in pump prices across different retailers.
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How do I save money when filling up?
With diesel prices soaring, it is important to know how to save money when filling up. Here are some tips to save money at the pump:
Firstly, consider using a diesel fuel card or a cashback card. Some cards offer up to 5% cashback on fuel purchases, which can result in significant savings over time. Loyalty programs and rewards systems, such as Shell's rewards program, can also provide discounts and savings. Additionally, look for apps that help you find cheaper fuel options, like the myRAC app, which has a Fuel Finder feature to locate the most affordable fuel in your vicinity.
Secondly, there are several driving habits that can improve your diesel mileage. Avoid excessive idling and revving of the engine. Instead, aim for a slow and steady acceleration. Maintaining a consistent cruising speed in the peak torque zone will give you optimal horsepower and mileage. Anticipating traffic flow and maintaining a safe following distance can also help, as you can avoid unnecessary stops and reduce acceleration.
Furthermore, try to limit your use of air conditioning, as it consumes fuel. Keeping your tires properly inflated and maintaining the recommended air pressure are also simple ways to improve fuel efficiency.
Finally, for those with mechanical diesel engines, consider collecting used oil from restaurants to make your own fuel. Alternatively, purchasing a large tank and having fuel delivered can be more cost-effective than filling up at the pump.
By combining these strategies, you can significantly reduce your diesel expenses and make your fuel budget stretch further.
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What is the Fuel Watch initiative?
The price of diesel fuel at the pump is governed by wholesale fuel prices, which are influenced by factors such as global crude oil prices and the exchange rate of the dollar to sterling. The price of diesel fuel can vary significantly, even over short distances.
Fuel Watch Initiative
The Fuel Watch initiative is a monitoring programme established by the RAC to ensure fair pricing of petrol and diesel at forecourts across the UK. The initiative involves daily monitoring of wholesale prices and pump prices, covering major supermarkets and other brands. When wholesale prices decrease, Fuel Watch calls on retailers to pass on the savings to drivers by reducing pump prices.
The Fuel Watch initiative provides in-depth insights into fuel pricing trends and updates its data daily. It offers a Fuel Finder feature on its free myRAC mobile app, enabling users to locate the cheapest fuel options within a specified radius. This feature helps drivers save money by identifying the most cost-effective filling stations in their area.
Additionally, Fuel Watch provides guidance on efficient driving practices and highlights the potential savings from using cashback credit cards at filling stations. It also offers analysis and explanations for fluctuations in fuel prices, helping consumers understand the factors influencing the cost of diesel and petrol.
By leveraging the Fuel Watch initiative, drivers can make informed decisions to minimise their fuel expenses and adapt to market changes. This service promotes transparency and fairness in the UK fuel market, empowering consumers to make the most economical choices when purchasing petrol or diesel.
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How does the government influence pump prices?
The price of diesel fuel is influenced by a multitude of factors, some of which are directly impacted by government policies and regulations. Here are some ways in which governments influence pump prices:
Taxes and Duties
One of the most direct ways governments influence pump prices is through the imposition of various taxes and duties on fuel products. In many countries, fuel duty is charged on every litre of fuel sold, and this duty is included in the pump price. For instance, in the UK, the government froze fuel duty at 57.95 pence per litre in recent years, and then reduced it to 52.95 pence in 2022 following the Russian invasion of Ukraine. Similarly, in the United States, federal taxes and fees are levied on gasoline and diesel fuel, with federal taxes being 18.4 cents per gallon for gasoline and 24.4 cents per gallon for diesel as of July 1, 2024. State taxes also play a significant role, with an average of 32.61 cents per gallon for gasoline and 34.76 cents per gallon for diesel as of the same date. These taxes can vary widely by state, with California having the highest gasoline tax of 68.1 cents per gallon, while Alaska has the lowest at 8.95 cents per gallon.
Exchange Rates and Crude Oil Prices
While not directly controlled by the government, exchange rates and crude oil prices are influenced by economic policies and global economic conditions. The strength of a country's currency relative to the US dollar can impact fuel prices, as oil is traded in dollars. Additionally, the cost of crude oil is a significant component of retail diesel fuel prices. Governments' economic policies and decisions can indirectly affect these prices.
Local Market Conditions and Regulations
Local market conditions, such as the location of fueling stations, the number of local competitors, and transportation costs, can also impact diesel fuel prices. Governments influence these conditions through regulations and policies that govern the fuel market. For example, the West Coast liquid fuels market in the US is relatively isolated and supplied mainly by in-region refinery production, leading to higher diesel fuel prices in that region.
Refining Costs and Profits
Refining costs and profits can vary seasonally and by region due to different gasoline formulations required to reduce air pollution. Governments set these standards and regulations, which can impact the refining process and, consequently, the pump prices.
Distribution, Marketing, and Retail Costs
The distribution and marketing of fuel involve various costs, including staff salaries, equipment, lease payments, insurance, and overhead expenses. These costs are influenced by government policies on labour, business operations, and supply chain regulations. Retail dealer costs and profits are also included in the retail price of diesel fuel, and governments can implement measures to regulate these costs.
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How does the global price of crude oil affect the pump price?
The global price of crude oil is the leading factor in determining the pump price of diesel fuel. Crude oil prices are influenced by a multitude of factors, including global supply and demand, economic growth, geopolitical events, and market conditions. These factors work together to set the price of crude oil, which then has a direct impact on the price of diesel fuel that consumers purchase at the pump.
Crude oil is a non-renewable resource that is essential for various industries, including transportation, heating, cooking, and electricity generation. The price of crude oil is determined by the global auction system, where the highest bidder wins the available supply. When the demand for crude oil is high or the supply is limited, bidders must be willing to pay a higher price to secure their supply. This increase in crude oil prices then gets passed down to consumers through the various stages of the supply chain, ultimately leading to higher prices at the pump.
Geopolitical events and disruptions in oil-producing regions can also significantly impact crude oil prices and, consequently, diesel fuel prices at the pump. For example, the recent conflict in the Middle East, including the attacks on Iran and the US bombing of nuclear sites, led to sharp swings in oil prices. The uncertainty created by these events can cause volatility in oil prices, affecting the cost of diesel fuel worldwide.
In addition to the cost of crude oil, other factors also influence the pump price of diesel fuel. Refining costs, distribution and marketing expenses, and federal, state, and local taxes all contribute to the final price that consumers pay. Retailers also adjust their prices based on local market conditions, competition, and their operational costs, which can include wages, rent, and supply sources.
It is important to note that the relationship between crude oil prices and pump prices is complex and dynamic. Changes in crude oil prices may not immediately or fully reflect in diesel fuel prices at the pump. However, due to the significant role of crude oil in the overall cost structure, fluctuations in global crude oil prices can have a substantial impact on the pump price of diesel fuel over time.
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Frequently asked questions
The price of diesel fuel at the pump varies across the UK. The price you pay for diesel at the pumps is governed by wholesale fuel prices, which are affected by the global price of crude oil and the dollar-to-sterling exchange rate. The RAC's Fuel Watch initiative monitors wholesale and pump prices daily, covering supermarkets and other forecourts.
You can use the Fuel Finder feature in the free myRAC mobile app to find the cheapest forecourts within a specified distance. Taking a small detour to visit a cheaper forecourt can save you a few pence per litre, which can lead to sizeable savings over time.
The price of diesel fuel at the pump is influenced by a combination of factors, including wholesale fuel prices, the global price of crude oil, the dollar-to-sterling exchange rate, and fuel duty charges. VAT also plays a role, although it tends to remain static.











































