The benefits of spark plugs are simple, and they offer great value to any vehicle owner. For starters, they are one of those items that affect engine performance quite directly as you want a consistent and dependable spark that releases the stored energy to effectively burn air/fuel mixture with ignition. This results in improved fuel economy, as the engine becomes able to sip fuel on account of its efficiency. Another benefit of a spark plug is that it inhibits emissions as well. A spark which burns clean means that less pollutants released into the air. In the third and fionally, by ensuring that the engine operates correctly, spark plugs help to reduce wear on the power unit of your vehicle, allowing a longer life. Fourth, replacing spark plugs cuts other engine repair costs in the future as it is an economical maintenance.