What are the benefits of using Envirox™?

Envirox™ improves fuel consumption, reduces harmful emissions and removes engine deposits, thus allowing improved combustion.

What is a dose rate?

1 L Envirox™ to 4000 L of diesel fuel.

How will this affect my engine warranty?

 Vehicle manufacturers require that only fuel meeting EN 590 should be used in their vehicles and that warranties may be invalidated if this instruction is not followed. The addition of Envirox™ has no effect upon the specification of diesel fuel which continues to meet the requirements of EN 590 with Envirox™ added.

What if this comes into contact with my skin?

Envirox™ is no more harmful than diesel fuel. Any contact with skin should be treated as for diesel fuel, i.e. washing affected area with soap and water.

How should I store Envirox™?

Bottles of Envirox™ should be stored out of direct sunlight.

Who else uses Envirox™?

Envirox™ is used extensively in the UK bus industry.

What is a DPF?

A Diesel Particulate Filter (DPF) is a device which physically removes air borne particles from the exhaust gas of a diesel engine. Most of these particles are made up of carbon-based ‘soot’. Hence, DPFs are also known as ‘soot traps’. In this way, they act to reduce the harmful emissions produced by diesel engines (e.g. ‘black smoke’).


Once trapped, however, the soot will quickly build up inside the DPF if it not periodically burnt off – a process known as regeneration. This may be passive, through the use of an on-board catalyst dosed into the exhaust stream; or active, through engine management to increase exhaust gas temperature, heating the DPF, or other methods.


However, the regenerative process requires a relatively high exhaust gas temperature which is not met at slow traffic speeds – a problem if a vehicle is mostly used for urban driving. The DPF may gradually block up with soot, leading to poor running of the vehicle. In some cases, a dashboard warning lamp will illuminate requiring immediate action which could include an expensive workshop visit and vehicle downtime. Even in the absence of actual blocking problems, fuel economy tends to worsen because the engine has to work against the back pressure caused by soot build up in the exhaust system.

DPF Removal?

Diesel Particulate Filters (DPFs) are usually fitted as standard to new diesel cars and vans to enable manufacturers to comply with air pollutant emissions standards. They limit emissions of airborne soot particles from diesel exhaust which are harmful to human health.


DPF Removal – Legal Position

Drivers experiencing frequent problems with DPFs may be tempted to simply remove the filter entirely to avoid further problems, and there are a number of companies advertising DPF removal services. Such companies often claim that it is not illegal to remove the DPF as the vehicle will still pass MOT smoke opacity test without it.


Although it may not be illegal for companies to provide this service, the same is unfortunately not true for the owner of that vehicle. 


Department for Transport guidance recently confirmed that it is an offence under the Road Vehicles (Construction & Use) Regulations (Regulation 61a (3)) to use a vehicle which has been modified in such a way that it no longer complies with the air pollutant emissions standards that it was designed to meet. Removal of a DPF, whilst not illegal in itself, will almost certainly result in a contravention of the above requirement making the vehicle illegal to use on the road. In addition, from February 2014, inspection of the exhaust system will be required as part of the MOT test and a missing DPF, where one should be fitted, will result in an automatic failure.


Drivers seeking a solution that is both more ethically responsible and less risky than DPF removal should try out Envirox™ DPF Assist. This is a new fuel treatment for regenerating DPFs. It is a fuel borne catalyst formulation that helps to burn off the trapped soot particles.


It works by:

  • Decreasing the level of soot particles produced during combustion.
  • Significantly lowering the temperature the exhaust gases need to reach to burn off the trapped soot particles in the DPF.


Envirox™ DPF Assist will also save fuel and so could prove much less costly in the long run!