Dodgy Diesel is Real, Here’s How Motul All in One Ultra Diesel Helps

South African drivers are facing a growing problem at the pump, diesel illegally blended with illuminating paraffin. Recent investigations have highlighted how widespread the practice has become. The result is fuel that looks and smells like diesel but lacks the lubricity, cetane quality and cleanliness modern engines need.

What paraffin does to a diesel engine?

Paraffin reduces the fuel’s natural lubricity. High-pressure pumps and injectors rely on the diesel itself for lubrication. When that protection is diluted, wear accelerates. Combustion quality also suffers, lower cetane leads to harder starting, incomplete burning, more soot and faster clogging of particulate filters. Deposits form more readily on injectors and in combustion chambers, reducing power and increasing consumption.

How Motul All in One Ultra Diesel helps fight against the symptoms of bad diesel:

Motul All in One Ultra Diesel is a concentrated multi-action diesel additive designed for all types of diesel engines (direct or indirect injection, turbo or naturally aspirated, with or without DPF/SCR).

Key actions relevant to paraffin-contaminated fuel:

Provides lubrication during the cleaning phase and helps restore critical lubricity to protect pumps and injectors.
Increases the cetane number of the fuel for more complete and efficient combustion.
Cleans injector nozzles, removes gumming in injectors and the injection pump, and clears deposits from combustion chambers and inlet valves.
Supports regeneration of the diesel particulate filter.
Protects the fuel from oxidation and helps limit corrosion throughout the system

How to use Motul All in One Ultra:

Pour the entire 300 ml bottle into the tank before refuelling.
Drive normally until the treated fuel is consumed.
One dose is sufficient for tanks up to 100 litres.
If necessary, a second successive treatment can be applied.

Motul All in One Ultra Diesel will not chemically remove paraffin from the fuel. It mitigates the damaging effects on the fuel system and combustion process.

The best long-term defence remains sourcing fuel from trusted outlets. When that is not always possible, a high-quality multi-action additive provides a practical layer of protection.

Available through authorised Motul workshops, retailers, and Takealot.

All technical details are available on the Motul All in One Ultra Diesel Technical and Safety Data Sheet. For ongoing protection, use regularly especially if fuel quality is uncertain.