There was a time when a grand prix driver was sacked for comparing his car to a truck. Ironically, at least half of the Formula 1 grid is now powered by a truck-engine development that's revolutionising efficiency.
Since the introduction of the current engine formula in 2014, the F1 internal combustion engine has been squeezed by fuel-flow restrictions and limited to 100kg of fuel (105kg next season). This limits the maximum instantaneous fuel flow and also the pressure at which fuel can be injected. It's been a challenge for designers to create power from so little fuel.
But this truck technology, known as pre-chamber ignition, is able to create power with a fuel/air mixture inside the cylinder that's at an almost incombustible level. This is believed to be at the heart of both the Mercedes and Ferrari power units.