Car running costs continue to rise as UK petrol and diesel prices went up again in April 2024. According to figures from RAC Fuel Watch, the average price of petrol on the last day of the month was 149.95p per litre, while diesel cost 157.76p. That’s an increase of 2p and 3p respectively on the averages at the end of March.
The means the cost of filling a typical family car’s 55-litre fuel tank with petrol now stands at £82.47. The same amount of diesel costs £86.77.
The RAC notes that prices have risen by 10p per litre so far in 2024. Prices were at their lowest on 16 January, when petrol cost 139.7p per litre and diesel was 147.6p.
Big regional price differences found
The RAC’s fuel price data shows that big differences persist in fuel prices across different regions of the UK. The East of England, Greater London and South East pay most for petrol, with an average price of 151.1p per litre. Greater London also has the most expensive diesel, at 157.1p.
Northern Ireland continues to have the UK’s cheapest fuel –142.3p for petrol and 148.2p for diesel. That’s a whopping discount of 8p and 7.4p per litre, respectively.
RAC fuel spokesman, Simon Williams, said: ‘We badly need to bring fuel prices on the UK mainland down to match those in Northern Ireland. We can clearly see the average cost of fuel in Northern Ireland is around 6p lower than the UK average, which is inexplicable.’
Even bigger regional differences exist in the prices charged by individual retailers. The RAC’s figures show a spread of prices charged by the ‘big four’ supermarkets – Asda, Morrisons, Sainsbury’s and Tesco – of 37p per litre for petrol and 39p for diesel.
Tesco has the smallest gap between it’s cheapest and most expensive fuel – 10p for petrol and 8p for diesel. Morrisons’ and Sainsbury’s fuel prices vary by 12p to 16p, but Asda’s vary by a whopping 36.2p per litre for both petrol and diesel.
BP and Shell fare little better, with price differences of between 24p and 30p.
What the RAC says
Simon Williams said: ‘Drivers are once again having to dig deep just to go about their daily lives. Some of this is down to the oil price and the pound-to-dollar exchange rate making wholesale petrol more expensive for retailer to buy but, unfortunately, it’s also very apparent that retailers are making massive margins on diesel.’
The average profit margin on petrol currently stands at 9.5p per litre, according to the RAC, but on diesel the margin has ‘rocketed’ to 17.5p, increasing by 6p in April alone. The long-term average margin is 8p.
Mr Williams added: ‘Drivers are once again being seriously overcharged for diesel. The wholesale price of diesel has been lower than petrol since the middle of April, yet diesel is nearly 8p a litre dearer at the pump. If retailers were treating drivers fairly this gap would be starting to close, instead of getting wider.’
The RAC called for the Competition and Markets Authority (CMA) to ‘get to grips with unfair retailer margins once and for all.’ The CMA’s Pump Watch initiative is due to launch imminently and is intended to provide consumers with transparent, real time fuel price data.
Fuel prices are due to a number of factors:
1. Crude oil price
2. E10
3. Delivery
4. Retailer margin
5. Fuel duty and VAT
Crude oil price
The price of crude oil is directly reflected in UK petrol and diesel prices. Indirectly, the cost of living is increasing as the price of goods and services have to be raised in line with the higher costs of running a business and its associated logistical operations – deliveries and so on.
The price of crude oil has has risen from a recent low of $75 a barrel to around $85, though that's still well below the 2022 high of $140. Prices continually fluctuate, however, as there are a number of ever-changing variables that contribute to its valuation.
After straightforward supply and demand calculations, the increasing number of unpredictable natural disasters, geopolitical instability, looming global recession and Russia’s invasion of Ukraine are all major factors in the price of oil. On top of that, Saudi Arabia recently announced it intends to cut oil production, which will also have a bearing on crude oil prices in the coming months.
The price of pump fuel is 90% determined by the wholesale price of Brent crude oil, according to RAC Fuel Watch. Whatever other factors may be in play, the price of crude oil is the dominant force behind the cost of fuel. Inconveniently, the price of pump fuel tends to lag behind that of crude oil, so it can be weeks before a fall in prices filters through to forecourts.
Delivery
The logistics of getting petrol and diesel to fuel stations via shipping channels and road tankers accounts for 1% of the total price of your fuel. That has a knock-on effect to business and industry, as well. Recent research by MoneySupermarket revealed that almost a quarter of vans drivers (24%) have turned down job opportunities because the high price of fuel means they are not cost effective.
It’s not clear if the on-going shortage of lorry drivers, which affects the fuel delivery sector of the haulage industry as much as any other, has had an effect on fuel prices. However, the shortages have driven up driver wages and we suspect a knock-on effect passed down to the consumer has been unavoidable.
Retailer margin
The mark-up charged by fuel retailers is the most contentious factor in the price of fuel. The RAC Fuel Watch team has been heavily scrutinising it for a long time; generally speaking, it can be anything from 2 to 10% of the price of a litre of fuel.
In June 2022, the Competition and Markets Authority (CMA) opened an investigation into forecourt prices, chief executive Andrea Coscelli saying it would, ‘provide advice to government on steps that might be taken to improve outcomes for consumers across the UK.’
In May 2023, the CMA reported that there is a significant lack of competition in the fuel retail industry, which is dominated by the supermarkets in Great Britain, and that has kept prices unduly inflated. For their part, petrol retailers maintain that their own costs remain high. The Petrol Retailers Association said that margins are, ‘often not enough to cover operating costs.’
Fuel duty and VAT
The tax we pay on the base price of fuel in the UK is a whopping 39% for diesel and 40% for petrol, which translates to a total of 58.48p per litre for petrol and 63.10p for diesel.
Fuel duty was cut by 5p per litre in the spring budget of 2022. While that move was welcomed, not all retailers passed it onto consumers – they’re not actually legally required to.
A public enquiry was called for in May 2022 by then-business secretary Kwasi Kwarteng but, in July the same year, the Competitions and Markets Authority found that, ‘on the whole, the fuel duty cut appears to have been implemented with the largest fuel retailers doing so immediately and others more gradually.’
However, the CMA did say there was a need for a deeper study into the road fuel market.
Sarah Cardell, CMA General Counsel, said: 'On the whole the retail market does seem to be competitive, but there are some areas that warrant further investigation. These include finding out whether the disparities in price between urban and rural areas are justified.
'This area of work is a major priority for the CMA and if we can help, we will. That’s why we are immediately launching a market study that will use our formal legal powers to investigate this in more depth. If evidence emerges of collusion or similar wrongdoing, we won’t hesitate to take action.' No such action has been taken.
If one tax isn’t enough, Value Added Tax (VAT) is slapped on top of the price of fuel, inclusive of fuel duty, at a rate of 20%. Mercifully, rumoured plans for a giant 23% hike in fuel duty didn’t materialise in the 2023 spring budget.
E10 petrol
In September 2021, E10 petrol replaced E5 at UK fuel stations. Both are biofuels, ‘E’ refers to plant-based ethanol, 10 is the percentage of ethanol in the fuel mix. Doubling the renewably-sourced component in petrol is said to make it more environmentally friendly.
However, a number of Parkers’ readers have reported that they are seeing significant reductions in the fuel economy of their vehicles running on E10 petrol. Some have switched to more expensive Super Unleaded – still a 5% bio-mix – to maintain their vehicles’ fuel economy.
The ethanol mix accounts for 6% of the price of petrol; the wholesale cost of ethanol has recently risen, as well. Ethanol is also used in B7 diesel fuel, accounting for 9% of its price.
What you can do to reduce your fuel bills
Driving more economically will help the situation. Accelerating more slowly is an easy win, as is making fewer short journeys. Increasing the distance between your car and the one in front helps, as well – the extra space means you can brake more gently when it slows down.
These small changes to the way you drive have the same effect as compound interest. The difference in fuel economy may seem negligible at first but, over the longer term, it adds up to make a big difference.
You should also shop around for fuel. Remember that supermarkets aren't always the cheapest and consider using the Petrol Prices app, which shows the pricing in your area.
If you’re looking to change your car, look more closely at fuel consumption figures. While considering a switch to an electric car will give cheaper running costs in terms of Miles Per Pound, be mindful of increased domestic electricity usage to make an informed decision.
Is it worth switching to electric?
Many motorists are switching to electric cars to avoid all the hidden costs in fuel prices. It improves their green credentials, too. Alas, it doesn’t seem to be possible to avoid increasing costs.
The cost of domestic electricity has spiralled since the start of 2022, which could hit you hard when charging an electric car at home. Though costs are expected to drop later in 2023, it’s little more than a drop in the ocean at this point. Many roadside electric car chargepoint providers have also significantly increased their kilowatt-hour charges.
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