Engine is the heart of the car, improper maintenance can affect the performance and service life of the vehicle. To keep the car away from 'heart disease', this H5 work points out several reasons why vehicles suffer from 'heart disease'. 1. Non-compliance with scheduled maintenance: Many people like to spend a lot of money on modification, but they often neglect the regular maintenance of the engine. According to professional car maintenance operators, vehicle failures caused by poor engine maintenance account for about 50% of total failures. 2. Oil deterioration: Different grades of lubricating oils will change in quality during use. After driving a certain distance, the performance will change, which may cause various problems to the engine. To avoid these failures, it is recommended to change the engine oil regularly based on the usage conditions, and keep the oil level moderate, generally between the oil level scale upper and lower limits. When the engine oil passes through the fine holes of the oil filter, the solid particles and thick substances are accumulated in the filter. If the filter is blocked, the engine oil cannot pass through the filter smoothly, which may burst the filter or open the safety valve, and pass through the bypass valve, still bringing dirty matter back to the lubrication part, accelerating the engine wear and internal pollution. Therefore, the regular replacement of the oil filter is essential. This H5 work, created by Eqxiu (eqxiu.com), provides online design and has a rich template library for quick creation.