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Designed for modern stop start & hybrid vehicles.

The introduction of stop start and hybrid engines has led to a build up of moisture in the fuel tank and fuel systems of modern vehicles, this accelerates the build up of contamination reducing engine performance and response, if left untreated fuel economy is compromised and corrosion will form in the system leading ultimately to component failure.

Tec4 Diesel System Cleaner Premium uses unique aqua technology which scavenges water and moisture from the system, locking it in suspension and releasing it during the combustion process as superheated steam. This coupled with detergents and cleaning agents ensures a complete system clean from fuel tank to exhaust.

Key Benefits:

  • Cleans fuel system components and provides anti wear protection.
  • Scavenges water and moisture from the system to prevent corrosion.
  • Improves engine performance and response.
  • Improves fuel economy
  • Stabilises cylinder compression and restores lost power.
  • Reduces exhaust emissions.


The product is simply added to the existing fuel in the fuel tank where it immediately goes to work adding lubricity, stabilising the fuel and scavenges water from the fuel tank.

As it passes through the system it dissolves gums, tars and varnish that has built up in the fuel lines and injectors and scavenges moisture.

Its unique aqua technology locks the moisture in suspension surrounding it with molecules which enable it to combust safely in the combustion chamber releasing it as superheated steam which, combined with the cleaning agents goes to work cleaning the piston crown, piston rings, exhaust valves and post combustion components.