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In competition, performance is the goal, and fuel is a key factor in achieving maximum speed or maximum endurance, with each category using its own specific fuel. This continues our series on fuels.
When the roar of the engines fades away, the real competition continues in a quiet laboratory where chemists search for the perfect blend of molecules. This is where the fuel that powers everything from two-stroke karts to Formula 1 cars is born, and the story of this fuel tells a broader tale of how motorsports drive everyday innovation in gasoline.Romain Aubry, Technical and Partner Relations Manager at Total, explains that the distinction between retail fuels and those intended for competition began in 1967, when the ELF brand entered the world of motor racing. “As soon as we arrived on the circuits, we understood that fuel was the number one lever for performance,” he explains. “We had to differentiate ourselves from the fuels sold at gas stations if we wanted to push the limits.” The goal, he adds, is simple but demanding: extract more energy per unit of fuel while protecting the engine from damage. This balance is at the heart of racing fuel development. Engineers must find the right balance between two conflicting priorities. Pushing the ignition timing to the limit of “knock” can reduce lap times by a few milliseconds, but it also exposes the engine to the risk of failure. Similarly, higher performance often means higher fuel consumption, but racing teams demand that every drop counts. The result is a series of tailor-made formulations, each adapted to the specific requirements of a discipline. A quick glance at the figures illustrates the contrast. While standard unleaded 95 octane fuel has a RON of 95 and a MON of 85, fuels designed for the track climb considerably higher:
– ELF MITS 46 (2-stroke motorcycle/kart) – 101.5 RON / 89.6 MON – ELF E85R (turbo or naturally aspirated 4-stroke rally, drift, hill climb) – 108 RON / 89 MON – ELF PERFO 105 (circuit, drag, drift) – 111 RON / 98 MON
These figures are not only a source of pride, they reflect a chemistry tailored to the architecture of each engine. “A turbocharged engine is subject to boost pressure, so its fuel must behave differently from that of a naturally aspirated engine,” notes Mr. Aubry. “Even within two-stroke and four-stroke platforms, the molecular mixture changes. Moto GP, for example, is limited by fuel volume (22 liters per tank), forcing engineers to concentrate maximum energy in a fixed space. In contrast, Formula 1 and the World Endurance Championship are limited by fuel mass, requiring a different molecular strategy aimed at maximizing energy per kilogram.”
The benefits of this research into high-octane fuels are being felt in the consumer market. “Competition is a laboratory,” explains Mr. Aubry. “Engineers who test fuels on the racetrack report their findings to the factories that supply local gas stations. ” When a new additive proves itself under the extreme conditions of a race, it can be adapted for everyday use, improving fuel efficiency and emissions for the average driver. In short, the fuels that power the world's most demanding races are more than just exotic liquids; they are the testing ground for the next generation of everyday gasoline. Every time a driver pushes the limits on a racetrack, a chemist in a laboratory pushes the limits of what a molecule can do, and the results end up in the fuel you put in your tank on Saturday morning. Total's laboratory includes a dedicated unit, Total ACS (Additives and Special Fuels), located in Givors, in the Rhône region. This branch is responsible for the research and development of all the solutions offered by the company. As there is no separate center for each product range, engineers must be proficient in the entire range. “It's very versatile,” explains Romain Aubry. “The same engineers work on all championships. Whether it's fuels, lubricants, or greases, their expertise is not limited to a single energy source or competition alone.” “These are engineers who work on competition, but also on mass-produced products, in order to facilitate technology transfer…”
From the public network of gas stations to the world of motor racing, Total's field of activity, like that of other major oil companies, is extremely broad. Beyond fuels, lubricants play an essential role in motorsports, as they determine both performance and reliability.
