The transmission oil of ATS-L needs to be changed every 2 years or every 40,000 miles. The changing cycle of transmission oil also depends on the model of the car. Some cars have a lifetime warranty for transmission oil change.

The potential dangers of not changing transmission oil include:

1. The transmission oil may deteriorate and evaporate under high temperature and high speed, leading to increased wear and even damage to the internal parts of the transmission.

2. Long-term non-changing transmission oil may cause a weak start-up phenomenon.

3. The vehicle may experience a slight slip during driving.

4. Long-term non-changing transmission oil may cause the transmission cooler to be blocked, leading to high transmission oil temperature and increased wear. The transmission oil may be damaged due to high temperature caused by long-time non-changing transmission oil.