TecLub Diesel Pre-Emission Test Treatment is a concentrated diesel fuel additive specially designed to be used before entering a periodical technical inspection where the latest emission tests are mandatory. Cleans the entire combustion system and quickly reduces black smoke, emission and soot particles. Improves combustion, engine performance and fuel economy. Assists in passing the new emission testing regulations in the Periodical Technical Inspection (PTI), MOT, TüV, Controle Technique, Technische Keuring, ITV, APK, etc. potentially preventing high cost of obligatory replacement of a Diesel Particulate Filter or Filtre a Particules (DPF or FAP).