It is possible that just after the maintenance, the internal sealing gasket is damaged due to the excessive use of the machine filter, and therefore the oil seepage, or it may be that the strength has not reached the specified value and is relatively loose, so oil seepage occurs.

The replacement method of the oil filter is as follows:
1. Start the vehicle for about 1 minute to allow the oil to flow fully, and then turn off the engine;
2. Open the oil filler cap and use tools to loosen the oil filter and oil bottom screws;
3. Place the oil basin under the oil bottom screw, loosen the oil bottom screw completely, and let out the old engine oil until it stops flowing at all;
4. Tighten the oil bottom screws and wipe off excess oil stains with cotton cloth. Unscrew the old filter, it is recommended to put a cotton cloth on your hands carefully, apply engine oil to the sealing ring of the new filter, and tighten it in a clockwise direction;
5. Add new oil from the oil filler port. It is recommended to consult the 4S shop in advance for the amount of addition, and tighten the filler cap after adding it;
6. Restart the engine for 12 minutes and observe whether the oil bottom screw and the machine filter are leaking. If the oil leaks, turn off the engine in time and check and deal with it. If there is no oil leakage, check the amount of oil on the oil dipstick after the flame is turned off, add it to the position above the center line of the oil scale at the standard position, and replace it.