要了解，不同环境不同驾驶习惯和需求，甚不同的机油和种类都让这个数据具有很多的不确定性。在这里教大家两个方法，让你自己就可以准确判断机油是否要更换。下面济南宝马汽车专修人员为您分析：

It is important to understand that different driving habits and needs in different environments, as well as different oil brands and types, all contribute to many uncertainties in this data. Here are two methods to teach you, so that you can accurately determine whether the oil needs to be replaced. The following is an analysis by Jinan BMW auto repair personnel:

1、通过机油试纸来观察

1. Observe with oil test paper

通过机油尺中取出少量机油滴在机油试纸上，然后静止放置一个晚上，等待上面的机油在试纸上完全扩散。如果扩散的机油油环、沉淀环、扩散环之间的边缘越硬，则机油性能衰减就越厉害。

Take a small amount of oil from the oil dipstick and drop it onto the oil test paper, then stand still for one night, waiting for the oil on the test paper to completely diffuse. If the edges between the diffused oil ring, precipitation ring, and diffusion ring become harder, the performance of the oil will deteriorate more severely.

2、根据换机油后的驾驶感觉来判断

2. Judging by the driving feeling after changing the oil

机油的性能都有“保质期”，在某一时期当你觉得动力“很肉”，加速缓慢时，这就说明机油的“保质期”到了，要去更换机油了。

The performance of engine oil has a "shelf life". At some point, when you feel that the power is "meaty" and the acceleration is slow, this indicates that the "shelf life" of the engine oil has expired and you need to change the engine oil.

另外当你更换了机油后，感觉到有明显的动力提升，那说明上次更换机油的里程有点太长了。下次可以适当提前500，这样1-2次你就可以找到一个比较准确的更换机油的里程。

In addition, when you change the oil, you feel a significant power increase, which indicates that the mileage for the last oil change was a bit too long. Next time, you can appropriately advance the mileage by 500 kilometers, so that you can find a more accurate mileage for changing the oil 1-2 times.

一般情况下，只需按照机油或者保养手册上建议的保养里程进行更换就已足够。在恶劣驾驶环境下，则养成定期观察机油情况的习惯，发现有变质倾向则及时更换之。

Generally, it is sufficient to replace the oil or the recommended maintenance mileage in the maintenance manual. In harsh driving environments, develop the habit of regularly observing the condition of the oil, and promptly replace it if there is a tendency to deteriorate.

还要提醒一下大家的是，更换机油的同时好把机油滤也一并换掉。机油滤的作用是拦截下机油中的杂质，如果不及时更换，上面累积的杂质就会造成堵塞。轻则会造成机油压力不足，机械部件润滑不好，严重的还会造成发动机过度磨损。还有什么问题就来我们网站http://www.lutongqixiu.com咨询！

Also, I would like to remind everyone that when you change the engine oil, you should also replace the engine oil filter. The function of the engine oil filter is to intercept impurities in the lower engine oil. If it is not replaced in a timely manner, the accumulated impurities on it will cause blockage. If it is light, it will cause insufficient oil pressure, poor lubrication of mechanical components, and even excessive engine wear. If you have any further questions, please come to our website http://www.lutongqixiu.com consulting service