Ameer Randolph
Fuel consumption is a critical factor in F1 racing, as it directly impacts the car's performance and the driver's ability to push the car to its limits. F1 cars are designed to be as light and aerodynamic as possible, which means that the fuel tank is relatively small compared to other types of cars. This means that the fuel consumption rate is high, and drivers must carefully manage their fuel usage throughout the race to avoid running out before the finish line. F1 cars are fuelled before the race and are not allowed to refuel during the race. As of 2019, the regulations stated that an F1 car could use up to 110 kg of fuel per race.
| Characteristics | Values |
|---|---|
| Maximum fuel allowed per race | 110 kg |
| Minimum fuel to be provided to FIA for post-race inspection | 1 kg |
| Fuel type | Unleaded petrol and ethanol |
| Ethanol content | 10% |
| Fuel calculation | Based on fuel used per lap during winter testing |
| Fuel calculation refinement | Race by race based on modifications made to the car and race conditions |
| Fuel temperature | Can be cooled by up to 15 degrees below ambient temperature |
| Fuel composition | Strictly regulated by the FIA |
| Fuel additives | Yes |
| Fuel safety | Strict safety requirements to minimize the risk of fire during crashes |
| Fuel efficiency | Plays a crucial role in race strategy |
| Fuel consumption rate | High due to small fuel tank |
| Refuelling during the race | Prohibited since 2010 |
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What You'll Learn
F1 fuel regulations
Fuel Type and Specifications
F1 cars use specialised "high-octane racing fuel" with additives and blending agents to enhance combustion and improve performance. The fuel specifications and composition are regulated by the FIA (International Automobile Federation). Each team has designated fuel suppliers that provide a specific blend tailored to their engine characteristics. The exact composition of F1 fuel is highly confidential, known only to the teams and fuel suppliers. Since 2022, the fuel used in F1 cars is a mixture of unleaded petrol and ethanol, with the ethanol content increased to 10%.
Maximum Fuel Allowance
F1 cars are subject to a maximum fuel allowance per race, which has been adjusted over the years. As of 2019, the regulations allow for a maximum of 110 kilograms of fuel per race (approximately 305 kilometres or 190 miles). This was an increase from the 105 kilograms allowed in 2018 to allow drivers to push harder without worrying about fuel conservation. The amount of fuel used is calculated in weight rather than litres or gallons.
Refuelling Restrictions
Refuelling during the race is prohibited in F1. Therefore, cars start the race with a full fuel load, aiming to have enough fuel to reach the end without any pit stops for refuelling. This strategy adds a layer of complexity to race strategy, as teams must optimise power output while minimising weight and fuel consumption.
Fuel Cooling and Volume
F1 teams can employ strategies to maximise the fuel volume in the tank. One technique is to cool the fuel, decreasing its volume and allowing more kilograms to fit into the tank. While this adds weight to the car, it enables the drivers to push harder without worrying about running out of fuel.
Energy Recovery Systems (ERS)
F1 cars utilise Energy Recovery Systems (ERS) to recover waste energy and improve efficiency. The MGU-H collects and deploys wasted energy from the turbocharger, while the MGU-K recovers waste kinetic energy from the braking system. These systems contribute to F1's road relevancy and the quest for more efficient energy usage.
Sustainability Initiatives
F1 has been pushing towards more sustainable fuels and practices. By 2026, F1 aims to introduce fully sustainable fuels, with no new fossil carbon burned. The power units will still provide over 1,000 horsepower, but with significantly less fuel used overall. This shift towards sustainability is a key focus for F1, and it will be interesting to see the continued evolution of fuel regulations in the coming years.
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Fuel consumption rate
Fuel consumption is a critical factor in F1 racing, as it directly impacts the car's performance and the driver's ability to push the vehicle to its limits. F1 cars are designed to be lightweight and aerodynamic, resulting in a relatively small fuel tank compared to other vehicles. This design contributes to a higher fuel consumption rate, requiring drivers to carefully manage their fuel usage throughout the race to avoid running out before the finish line.
The fuel allocation regulations play a crucial role in ensuring fair competition among teams. Each team must declare their intended fuel usage before the race, and the fuel is measured before and after to prevent exceeding the maximum allowed limit. The maximum permitted amount of fuel for an F1 car during a race is typically limited to 110 kilograms or approximately 30 gallons. However, it's important to note that teams may opt to use less than the maximum allowed fuel to reduce the vehicle's weight, which can impact its performance.
The nature of the circuit, car design, aerodynamics, and driver behaviour all influence fuel consumption rates. The characteristics of the race track, such as the number of high-speed straights or tight corners, will determine how much fuel is used. Additionally, the design of the car, including its weight and aerodynamic features, plays a significant role in fuel efficiency. A lighter car with improved aerodynamics will generally consume less fuel.
The driving style and techniques employed by the driver also impact fuel usage. Aggressive driving behaviours, such as hard braking and rapid acceleration, tend to increase fuel consumption compared to a smoother and more controlled driving style. Drivers may need to adjust their approach to conserve fuel, such as lifting off the throttle earlier when approaching corners or employing fuel-saving strategies like "lift-and-coast."
In recent years, F1 has witnessed a push towards sustainability, with advanced biofuels, synthetic fuels, and hybrid technologies gaining prominence. The introduction of Energy Recovery Systems (ERS) and hybrid engines in F1 cars aims to maximise waste energy recovery and enhance overall fuel efficiency, benefiting both the sport and wider society through technological advancements.
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Fuel weight calculations
F1 cars are stipulated to carry a maximum fuel weight of 110 kg per race, with at least 1 kg to be made available for post-race inspection by the FIA. The amount of fuel an F1 car can use per race was increased to 110 kg in 2019, up from 105 kg in 2018, to allow drivers to push their cars to the limit lap after lap without worrying about conserving fuel. This regulation change has made for more high-octane races in the closing stages.
The weight of the fuel is a crucial factor in the performance of F1 cars. The more fuel a car starts with, the heavier it is, and the more lap time it costs. For instance, 10 kg of fuel can cost a driver 3 or 4 tenths of a second, depending on the circuit and conditions. The weight of the fuel also affects the cornering speed and acceleration capabilities of the car.
To ensure an F1 car doesn’t run out of fuel during a race, team engineers calculate how much fuel is used per lap during winter testing and then refine these calculations race by race, taking into account modifications made to the car and the conditions at each race. During the free practice sessions of a race weekend, different race paces are used to simulate certain periods of the pre-planned race strategy, allowing engineers to adjust their calculations accordingly. The car is then fuelled for the race based on these calculations, with the aim of having enough fuel to make it to the end of the race with the least amount of extra weight being carried.
F1 fuel technology has been heavily regulated by the FIA since 1996, with rules mandating that the fuel must be of Euro 95 standard and composed of compounds found in commercial pump fuel. F1 fuel is a mixture of unleaded petrol and ethanol, with the ethanol content increased from 5.75% to 10% in 2022. F1 fuels also contain additives and blending agents to enhance combustion, and the final product is highly optimized for peak performance by each manufacturer.
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Fuel tank design
The fuel tank in an F1 car is designed to be flexible and indestructible. It is made of high-quality rubber lined with kevlar for protection against crashes. The tank is balloon-shaped, allowing it to be positioned behind the driver but directly ahead of the engine. This design ensures that the tank is as small as possible for aerodynamic purposes while still complying with FIA regulations, which mandate a maximum width of 800mm.
The size of the fuel tank is a critical factor in F1 racing as it directly impacts the car's performance and the driver's ability to push the vehicle to its limits. A smaller tank means a higher fuel consumption rate, requiring drivers to carefully manage their fuel usage throughout the race. As a result, F1 teams must strategically decide on the amount of fuel to carry, balancing the need to finish the race with the desire for a lighter car, which can achieve faster lap times.
To optimise performance, F1 fuels contain additives and blending agents to enhance combustion. The exact composition of the fuel is highly confidential and tailored to each team's engine characteristics. The FIA regulates the specifications and composition of the fuel, ensuring that all teams use a mixture with similar properties to fuel available at the pump for road cars.
In recent years, there has been a push towards more sustainable fuels in F1. For the 2022 season, F1 cars switched from high-octane fuel to 87-octane fuel with a 10% ethanol content, up from 5.75% in 2021. This change was implemented to reduce greenhouse gas emissions and promote sustainability. Additionally, F1 has been increasingly focused on hybrid technology, with the introduction of Energy Recovery Systems (ERS) to maximise the efficiency of waste energy.
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Fuel additives
F1 cars can use a maximum of 110 kilograms of fuel per race (305km / 190 miles). This limit was increased from 105kg in 2019 to allow drivers to push their cars to the limit without worrying about conserving fuel. The amount of fuel used is calculated in weight, not volume, and teams will calculate fuel usage per lap during winter testing, refining their calculations race by race.
The fuel used in F1 cars is a mixture of unleaded petrol and ethanol, with the ethanol content increased to 10% in 2022. This fuel is a specialised "high-octane racing fuel" that contains additives and blending agents to enhance combustion. The exact composition of the fuel is highly confidential, but it must resemble the fuel that can be purchased at the pump for a road car.
The additives used in F1 fuel are tailored to each engine and are designed to improve performance and lubrication. For example, Shell V-Power fuel contains esters, which give it a fruity smell. The use of additives allows teams to extract the most energy from the available fuel and improve vaporization for faster mixing of fuel and air.
F1 fuel is also cooled to increase density and improve performance. Teams will cool the fuel to around 10°C, and it can be cooled to up to 15 degrees below ambient temperature to fit more kilograms into the tank.
F1 is moving towards more sustainable fuels, with 2026 regulations introducing sustainable fuels with alcohol and algae as possible ingredients. This rule change is part of F1's commitment to being carbon neutral by 2030 and will see no new carbon from fossil fuels released into the atmosphere.
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Frequently asked questions
F1 cars can use a maximum of 110 kilograms of fuel per race (305km / 190 miles). However, they don't always fill the car with that much fuel as the car's performance is affected by how much fuel it carries.
Fuel consumption is a critical factor in F1 racing as it directly impacts the car's performance and the driver's ability to push the car to its limits. F1 cars are designed to be as light and aerodynamic as possible, which means that the fuel tank is relatively small compared to other types of cars.
Team engineers start making calculations on how much fuel is used per lap during winter testing, then refine their calculations race by race based on modifications made to the car, and the conditions at each race. The car is then fuelled for the race based on these calculations, with the aim to have enough fuel to make it to the end of the race with the least amount of extra weight being carried.
