A car is composed of many precision parts. If a car breaks down, it is difficult for ordinary car owners to determine where the problem is with the car. It is hoped that through the popularization of automobile knowledge, the ability of car owners to recognize the car and identify car failures can be improved, so as to help car owners better understand their car and become an excellent car user. After returning from the holiday, many car owners must have had a pleasant and leisurely holiday. Even if you don't have a long drive to go to the suburban mountains or the Internet celebrity city to check in, at least you can go to the scenic resorts around the city for a sweet two-person tour. Cars are frequently used during long vacations and most of the roads are country roads. Then, how should the car be maintained and restored after the vacation.