Is an organo-metallic diesel fuel additive to be used as a catalyst for the regeneration of diesel particulate filters. DPF 500 lowers the ignition temperature of soot collected in the diesel particulate filter and optimizes periodic combustion of accumulated soot, a process known as filter regeneration. The unique combination of a clean fuel system, clean combustion with lower emissions and catalysed soot particles will assist in keeping the catalytic converter, exhaust gas recirculation system (EGR) as well as the turbo compressor and its variable geometry vanes clean from deposits.