Xiao Liu was going to drive home after work, only to find that no matter how he started it, the engine couldn't catch fire, which worried him. What is the reason?

There are probably two reasons for missing the bus: 1. The bus ran out of gas. Although you drive to work, you also use up the last drop of oil, because you usually just drive to and from work, and because you drive less, you ignore the fuel consumption. 2. The spark plug is damaged and cannot ignite the gasoline entering the cylinder. It is recommended to go to 4s shop to replace better and more expensive spark plugs. The service life will be longer, the fuel consumption will be reduced, and carbon deposition is not easy to occur. More importantly, it is easier to ignite, especially in winter!