Why Honda fit use 8 spark plugs?

The Honda Fit uses eight spark plugs primarily because it features a 1.5-liter i-VTEC engine with a dual overhead cam (DOHC) design. This setup includes four cylinders, and each cylinder is equipped with two spark plugs to enhance combustion efficiency, improve fuel economy, and reduce emissions. The dual spark plug arrangement allows for more complete combustion of the air-fuel mixture, resulting in better performance and lower engine noise.