Here's why:
* Engine Function: The engine's primary function is to generate power. It does this regardless of the transmission's position.
* Neutral Gear: The neutral gear disconnects the engine from the wheels, allowing the car to coast without power.
* Fuel Consumption: The engine still consumes fuel when running in neutral, although slightly less than when driving.
Important Note: Leaving your car running in neutral for extended periods is not recommended, as it wastes fuel and can potentially overheat the engine.