Here’s how it works: Electrical energy from the engine’s ignition coil is stored in the built-in capacitor. At the exact moment needed, that energy is released in an amazingly powerful and quick (two nanosecond) high-energy pulse. The result: The improved combustion efficiency burns fuel sooner and more effectively, which equals improved mpg, less CO2 based emissions, and better overall drivability. Even the green get greener! For example, in this EPA US06 fuel consumption lab test, even the icon of fuel economy.