There is no specific number of grams of soot that is allowed inside a diesel particulate filter. Instead, there are standards for how many soot particles a vehicle is allowed to emit, and the DPF is designed to ensure that the vehicle meets those standards.
Soot emission standards vary depending on the type of vehicle and the location where the vehicle is used. In some countries, and for certain types of vehicles such as diesel vehicles in Europe, soot emission standards are stricter than in other regions.
From 2023, a mandatory particle test is carried out during the MOT inspection in several EU countries. A particle counter measures the particles emitted by a diesel vehicle. You can read more about this in our blog: new soot test inspection.
It is important to remember that a DPF helps the vehicle comply with emission standards, but it cannot completely prevent the vehicle from emitting soot. Over time, diesel particulate filters will become clogged and must be replaced to ensure that the vehicle continues to meet soot emission standards.
That is why it is important to regularly maintain the DPF in your vehicle and replace it when necessary. Want to clean your DPF yourself? This can be done with a DPF cleaner, a fuel additive from a brand such as Lindemann.
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