The replacement steps of the oil filter are: 

1. Remove the lower oil screw plug and discharge the engine oil; 

2. Wipe the oil drain plug and tighten it; 

3. Loosen the oil filter with the oil filter wrench and remove it; 

4. Apply the engine oil on the O-ring of the oil filter; 

5. Screw on the new oil filter. 

The precautions for replacing the oil filter are as follows: 

1. When removing the oil filter, the filter wrench or appropriate tool should be used to prevent damage to the thread of the connection part; 

2. The oil and oil filter should be replaced at the same time, which is conducive to prolonging the service life of the engine; 

3. Do not screw the filter too tightly to prevent damage to the sealing pad.