在自己换机油之前,首先要明白为什么要自己换机油?因为汽车这个东西,发动机是最重要的部件。人要身体健康,得了病固然要治疗,但是平时注意保健和锻炼,不让疾病缠身似乎更重要。发动机也一样,机油对保护发动机非常关键,而机油的质量千差万别,采用质量高的机油是自己换机油的一个优点。另外,由于换机油是 Before you change your engine oil, you must first understand why you need to change your engine oil. Because of this car, the engine is the most important part. People should be in good health and treated for the disease, but it is even more important to pay attention to health care and exercise to prevent the disease from being ridden. The same is true for the engine, which is critical for protecting the engine, while the quality of the engine oil varies widely. Using high-quality engine oil is an advantage for itself. In addition, because the replacement oil is