Fuel Additives

Mitchell & Webber fuel additives will enhance the performance of your equipment and machinery by improving the quality of your fuel.

Each product has been scientifically developed to tackle a wide range of common problems associated with fuel, the end result providing increased efficiency, prolonged service of your machinery and better economy.

premium additive

Premium Heating Oil

An additive pack for domestic kerosene (BS2869:C2) that can be used to create a premium grade fuel. It is available with the inclusion of fragrance for use in environments sensitive to fuel odours or where sensory evidence of the premium fuel needs to be demonstrated.

Size: 100ml, 200ml

Treatment Ratio: 1:5000

premium additive

Diesel Supreme

Diesel Supreme fulfils two functions:

  1. to act as an additive package for unadditised, terminal-sourced DERV (basic EN590 diesel)
  2. to upgrade retail diesel to premium grade fuel

Size: 200ml, 500ml, 1 Litre

Treatment Ratio: 1:2000

premium additive

Gas Oil Conditioner

Mitchell & Webber Gas Oil Conditioner provides an all-in-one treatment for gas oil. It will improve day to day running of diesel engines and will stabilise fuel during storage.

Size: 100ml, 200ml, 500ml

Treatment ratio: 1:2000

premium additive

Marine Fuel Conditioner

Mitchell & Webber Marine Fuel Conditioner is a multi-functional fuel additive  package suitable for use with Gas Oil and Marine Gas Oils (MGO) including all grades of distillate marine fuels; DMA, DMB, DMX, DMZ used in high speed diesel engines. The additive has been formulated to improve and upgrade the fuel quality; it allows for the decrease in fuel sulphur content and provides protection against contamination with FAME (biodiesel).

Size: 100ml, 200ml, 500ml

Treatment Ratio: 1:2000

corrective additive

Diesel Defender

Mitchell & Webber Diesel Defender is a liquid anti-theft marker dye for UK non-rebated fuel, typically known as white diesel, road diesel or DERV.

200ml treats 2,000 litres of fuel

corrective additive


Fuel soluble biocide and preservative, covering a variety of bacteria, viruses, fungi and yeasts.

Approved as a fuel additive by: Mercedes Benz, DAF, MAN, NATO, Deutz, Shell, the Swiss Army and others

Weight: 1 kg
Size: 50ml, 100ml, 200ml

corrective additive

Anti-Wax Additive

Mitchell & Webber Anti-Wax fuel additive is formulated to improve the cold flow and handling properties of diesel and gas oil.

Size: 200ml, 500ml, 1 Litre
Treatment Ratio: 1:1000

corrective additive

Diesel Power Restorer

Mitchell & Webber Diesel Power Restorer is a specially formulated fuel additive designed to break down and disperse hard lacquers and internal diesel injector deposits (IDID) to bring fuel flow and engine power back to optimum levels quickly.

Treatment Ratio: 1:400
Size: 500ml

corrective additive


Mitchell & Webber Sludgebuster is a formulated chemical additive for use as a tank, pipework and vessel cleaner where fuel, oil or other hydrocarbon contamination and solids build-up is a problem.

Size: 1 Litre
Treatment Ratio: 1:1000