How does proper engine tuning impact fuel efficiency?

Proper engine tuning significantly impacts fuel efficiency primarily by optimizing air-fuel mixtures. When an engine is properly tuned, the ratio of air to fuel is adjusted to the ideal levels for combustion. This optimization ensures that fuel is burned more completely, leading to better engine performance and efficiency. A correctly mixed air-fuel ratio means that the engine can produce more power while consuming less fuel, thereby improving overall fuel economy.

When the air-fuel mixture is off, either too rich (too much fuel) or too lean (too much air), it can lead to inefficient combustion, resulting in wasted fuel and increased emissions. Therefore, maintaining the correct air-fuel mixture is vital for efficient engine operation and helps maximize the distance that can be traveled on a given amount of fuel.