What are the reasons for frequent DPF regeneration?
2 Answers
DPF regeneration occurs frequently due to the following reasons: 1. Use of poor-quality gasoline: Inferior gasoline contains a large amount of impurities and carbon compounds, which leads to increased particulate matter in the vehicle's exhaust, naturally causing the DPF to clog more easily; 2. Not using low-ash engine oil: Low-ash engine oil contains very few impurities and is more suitable for use in China VI vehicles. If low-ash engine oil is not used, the likelihood of DPF clogging increases; 3. Long-term low-speed driving: Driving at low speeds reduces the combustion efficiency of the vehicle's fuel, resulting in an increase in fine particles in the exhaust pipe.
As a long-time diesel car owner, I've given a lot of thought to the frequent DPF regeneration issue, which mainly stems from driving habits. For instance, frequently driving only short distances where the engine doesn't have time to warm up properly means the DPF never reaches the high temperatures needed for automatic cleaning. Another factor is constant city traffic congestion or low-speed crawling, where the engine runs at low RPMs and can't generate enough heat, allowing particulate matter to accumulate faster and forcing the system to regenerate more frequently. A common culprit is using the wrong engine oil or low-quality diesel fuel, which accelerates clogging—I personally experienced significant improvement after an oil change. Ultimately, these issues not only increase fuel consumption but also damage components, leading to costly maintenance in the long run. My advice is to take the car on highway runs periodically or schedule regular professional inspections.
