Does nano-air filtration really save fuel?

1, Nano Jiahai new air filter can save fuel, because the air filter is installed at the air inlet of the engine, which actually forms resistance to the air. Therefore, without this filter, the engine is easier to inhale, and its own power consumption will be less, which naturally saves fuel.

2, but the air filter can never be omitted. Without it, the engine will suck in a lot of larger particles, which will cause the cylinder to "pull" the cylinder wall, which will lead to the deterioration of compression ratio and the reduction of engine power.