Rajan Wilcox
Formula 1 cars are known for their speed and power, but how much fuel do they actually carry? The maximum amount of fuel an F1 car can carry during a race is 110 kilograms or approximately 28 gallons. However, teams don't always fill the tanks to capacity as a heavier car can result in slower lap times. F1 fuel is also tightly regulated by the FIA to ensure it meets certain standards and is similar to the fuel available at gas stations. With the sport's focus on fuel efficiency, F1 teams carefully calculate fuel usage and employ strategies to optimize performance.
| Characteristics | Values |
|---|---|
| Maximum fuel usage | 110 kg or 28 gallons |
| Minimum fuel octane | 87 |
| Fuel calculation | Based on the amount of fuel used per lap during winter testing |
| Fuel tank capacity | 30 gallons |
| Fuel tank material | Rubber |
| Fuel tank shape | Balloon-like bladder |
| Fuel tank location | Between the driver and the engine |
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What You'll Learn
F1 fuel tanks hold approximately 18-30 gallons
The maximum amount of fuel allowed in an F1 car during a race is 110 kilograms, which is approximately 28 gallons. This regulation was implemented in 2019, increasing the previous limit by 5 kilograms. F1 cars typically race for around 190 miles, and they strategically calculate the required fuel to complete the race without any extra weight.
The calculation of fuel needed per race is meticulously planned by engineers, who consider the track conditions, car modifications, and race strategy. During the race, fuel-saving techniques such as lift-and-coast are employed to ensure the car finishes the race without running out of fuel.
The shape and size of the fuel tank are also critical to the car's performance. The tank is balloon-shaped to fit snugly behind the driver and minimise aerodynamic drag. Additionally, the FIA regulates the width of the tank to be under 800mm.
In summary, while F1 fuel tanks can hold up to 30 gallons, teams typically fill them with less fuel to reduce weight and improve performance. The strategic calculations and fuel management techniques ensure that cars have just enough fuel to cross the finish line.
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F1 cars can use a maximum of 110kg of fuel per race
F1 cars are not refuelled during a race. This practice has been banned since 2010 due to safety and budgetary reasons. In 2009, Kimi Raikkonen suffered minor burns after a fuel spillage from Heikki Kovalainen’s McLaren caused a fire in the pits at the Brazilian Grand Prix. During the 1994 German Grand Prix, a similar incident occurred when Jos Verstappen, father of Max Verstappen, was injured during a pit stop after the fuel hose poured fuel over him, the car, and nearby mechanics, causing a fire.
In addition to safety concerns, the FIA also decided to ban refuelling during races due to the high costs associated with transporting heavy fuelling equipment around the world to each grand prix, resulting in higher freight charges.
Instead of refuelling during the race, F1 cars are fully fuelled ahead of the race to ensure they can make it to the finish line. Team engineers start making calculations on fuel usage per lap during winter testing, refining their calculations for each race based on modifications to the car and race conditions. The car is then fuelled based on these calculations, with the aim of having enough fuel to reach the end of the race while carrying the least amount of extra weight.
The fuel tanks in F1 cars have a capacity of around 18-30 gallons, but teams typically do not fill them completely to keep the weight of the car down and maintain optimal performance. The fuel used in F1 cars is similar in composition to commercially available gasoline, with a minimum octane rating of 87 since 2022, although the mix of chemicals is more tightly controlled.
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F1 fuel is similar to commercially available gasoline
F1 cars can carry a maximum of 110 kilograms of fuel per race (305km / 190 miles). However, teams will often put in less fuel to reduce the weight of the car and increase its speed. The fuel cells in the cars hold approximately 18 US gallons, but teams will attempt to put in as little as possible at a time.
While F1 fuel is not allowed to contain any compounds not found in commercial fuels, the final product is highly optimized for peak performance by each manufacturer. Each team has designated fuel suppliers that provide a specific blend tailored to their engine characteristics. F1 fuels have strict safety requirements to minimize the risk of fire during crashes.
In recent years, there has been a push towards more sustainable fuels in F1, such as advanced biofuels or synthetic fuels. The exact composition of F1 fuel is considered highly confidential, known only by the teams and fuel suppliers.
F1 cars have also had fuel-flow meters since 2014, monitored by the FIA, to ensure that the engine cannot consume fuel at more than 100kg per hour. The sensor checks the flow 2200 times per second. For the 2020 season, a second fuel-flow sensor was introduced to better police the rules surrounding fuel usage, with encrypted data to ensure that the teams cannot circumvent the measurements.
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F1 fuel tanks are flexible, balloon-shaped bladders
The bladder is made from a variety of materials designed to make it flexible yet extremely durable. The exact material composition is not publicly available information, as F1 teams maintain a competitive edge by keeping such details secret. However, we know that the material must be highly durable because it needs to contain highly volatile fuel without rupturing or leaking.
The bladder design also enables the fuel tank to be as small as possible, which improves the car's aerodynamics. This design feature is crucial for F1 cars, as aerodynamics play a significant role in their performance. By reducing the fuel tank's size and placing it in a specific location, engineers can manipulate airflow around the vehicle to create downforce, enhancing the car's grip and stability at high speeds.
The flexible bladder design is also advantageous for safety reasons. In the event of a collision or impact, the bladder can deform and move with the impact, reducing the risk of rupture and fuel leakage. This reduces the risk of fires and explosions, enhancing the overall safety of the vehicle.
In addition to the bladder's shape and flexibility, its single-piece construction is noteworthy. The fuel cell, or bladder, is made from one piece of rubber, ensuring that there are no seams or joints that could potentially leak. This design further contributes to the safety and durability of the fuel tank, making it well-suited to the demands of F1 racing.
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F1 cars don't refuel during races
F1 cars have not refuelled during races since 2010, when the practice was banned by Formula One's governing body, the FIA. This was done primarily for two reasons: to reduce costs and to improve safety.
Before the ban, refuelling during races was an exciting strategic element of F1 racing. Teams that lacked the power or performance of their rivals could use a lighter fuel load to gain pole position and maintain their lead by refuelling during the race. However, this led to increased costs as teams had to transport fuel rigs from track to track worldwide.
Refuelling during races was also a safety hazard. F1 fuel is essentially the same as the gasoline used in road cars, which is more combustible than the ethanol-based fuel used in Indy racing. This higher combustibility increases the risk of fires during refuelling, as seen in incidents involving Verstappen and Kimi Raikkonen.
To ensure F1 cars do not run out of fuel during a race, engineers calculate the approximate fuel requirements during practice sessions and winter testing. They then refine these calculations based on modifications to the car and race conditions. The car is fuelled for the race based on these calculations, aiming to have enough fuel to finish without carrying extra weight.
F1 cars are now allowed a maximum of 110kg of fuel at the start of the race and must provide a 1-litre sample to the FIA at the end. This rule ensures that teams do not gain an advantage by starting with less fuel and also encourages fuel efficiency.
While some have called for the reintroduction of refuelling during races, it is unlikely to return due to the safety concerns and costs involved.
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Frequently asked questions
F1 cars are not refuelled during the race and are fuelled before the race with enough fuel to finish the race. The maximum amount of fuel an F1 car can carry is 110kg or about 28 gallons. The fuel tank has a capacity of 30 gallons, but it is not filled to the maximum to keep the weight of the car down.
Engineers start making calculations on how much fuel is used per lap during winter testing and then refine these calculations race by race. They also consider the modifications made to the car and the conditions at each race.
The fuel tank in an F1 car is referred to as a "bladder" and is made from a variety of materials to make it flexible yet durable.
Races are usually around 190 miles long, and with a maximum fuel capacity of 28 gallons, the average fuel economy of an F1 car is about 6-7 miles per gallon.
F1 cars use a minimum of 87-octane fuel, which is similar to the fuel available at gas stations. The main difference is that the mix of chemicals is more tightly controlled in F1 fuel.
