With the introduction of the improved vegetable oil standard, good conditions were already created for the reliable operation of converted vehicles with a diesel particulate filter some time ago. In particular, the first generation of diesel particulate filters worked reliably and also meant that vegetable oil engines could be operated reliably with this exhaust gas purification technology. Due to technical changes of some manufacturers in the diesel particle filter technology, we are now also able to convert the latest engines with diesel particulate filters. Currently, this involves Bosch engines with solenoid valve injectors and active regeneration driven by an extra fuel injection in to the exhaust pipe. For engines where the active regeneration is driven by post-injection into the combustion chamber or cylinder, we still do not offer any conversion packages yet.