Pre-Emission Test Treatment

Fast acting Pre-MOT Treatment

Reduce exhaust emissions and help your vehicle pass the strict new MOT Emission Test.


Reduces exhaust emissions and soot.
Reduces black smoke.
Improves combustion, engine performance and fuel economy.
Cleans injectors, restoring injector spray pattern.
Cleans the entire fuel system including Diesel Oxidation Catalyst and Diesel Particulate Filter.


Add one bottle of 325 ml to the diesel fuel tank containing a minimum of 30 litres of fuel.
Drive at least 50 km on the motorway before taking the vehicle for an official emission test.
Can be used as a curative treatment in the event of an emission failure.
For best result use every third tank filling and use 150 km before MOT test.
Results may vary due to service history, age and mileage.
Bottle is suitable for capless fuel fillers
For all diesel engines, including common rail and pump injector engines.
Compatible with all diesel system components including catalytic converters, Diesel Particulate Filters and SCR systems.
For diesel and bio diesel up to B30.


PN 31964 – 12x325 ml – EN



The fuel system of a car is highly engineered and extremely sensitive to contamination. This contamination can increase engine noise, exhaust emissions, fuel consumption and reduce lubrication and engine power. Using Wynn’s Fuel treatments on a regular basis will help keep the fuel system clean and the engine operating efficiently, reducing your fuel consumption and cutting harmful emissions drastically. It will save you money and it is good for the environment!