Car DPF Cleaning: The DPF (Diesel Particulate Filter) is a vital component in BS6 diesel cars. Poor driving habits can quickly clog this filter, significantly reducing vehicle performance and acceleration. Repairing or replacing a clogged DPF can be expensive. Here are some common mistakes you should avoid to keep your diesel car running smoothly.
🚗 Risk of Short City Drives and Low-Speed Driving
The biggest reason for DPF clogging is frequent short-distance driving or heavy city traffic. When you drive only 2–3 km at a time, the engine does not fully warm up, so the carbon trapped in the filter does not burn off. This process is called passive regeneration, which activates only when the engine reaches proper operating temperature.
Tip: Take your car on an open highway run at least once a week.
🛢️ Using the Wrong Engine Oil
Many car owners use cheaper engine oil to save money or due to lack of awareness. BS6 diesel engines specifically require Low SAPS (Sulphated Ash, Phosphorus, and Sulphur) engine oil. Regular oil produces more ash during combustion, which can permanently clog the fine pores of the DPF.
Tip: Always use the manufacturer-recommended synthetic oil grade.
🛣️ Highway Runs and the ‘2000 RPM’ Rule
The most natural way to clean the DPF is to burn off the soot. For this, drive your vehicle on the highway twice a month at a steady speed of 60–80 km/h for 20–30 minutes, keeping engine RPM above 2000. This helps the DPF heat up properly and burn accumulated carbon.
⚠️ Ignoring the DPF Warning Light
Never ignore the DPF warning light on the dashboard. When the yellow light appears, it usually means the filter is about 40–50% clogged and needs regeneration. If ignored, the light may turn red and the car can enter limp mode (low power). At that stage, professional cleaning is usually required.
⛽ Poor Fuel Quality and AdBlue Neglect
Fuel quality directly affects the DPF. Low-quality diesel produces more smoke and soot, which can quickly clog the filter. Also, BS6 diesel vehicles require proper AdBlue (urea) levels. AdBlue helps reduce emissions and keeps the emission control system working efficiently.