Racing fuel not only delivers performance but also eliminates the variable of gas station fuel, which is never 100% the same.
Racing fuels can vary greatly depending on the area of application (rally, circuit, dragster or formula) or depending on the engine used. Racing fuel has completely different requirements in a turbo engine than for an atmospheric engine.
Racing oils from Elf, the called HTX line, are not available in normal stores. They are designed exclusively for motorsport and are fundamentally designed for performance.