How to add fuel injector cleaner (petrol system cleaner)

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OVERALL DIFFICULTY INDEX: 1/10
  • NO TOOLS NEEDED FOR THIS JOB
  • IF YOU HAVE NO EXPERIENCE YOU SPEND 5 MINUTES TO CARRY OUT THIS JOB
  • NO PARTICULAR RISKS EXCEPT THE PRODUCT IS NOT TO BE INHALED OR DRUNK..​
BEFORE YOU START
  • Be aware that this is a preventive but efficient fuel treatment.
  • It will not miraculously fix all misfires you are facing.
  • Injector cleaners can be used on regular basis in countries with relatively poor gasoline quality.
DISCLAIMER:
Our pictorials are of informative nature and do illustrate works carried out by ourselves at our own premises for our own use and satisfaction.
Readers who envisage to carry out similar works inspired by the below method shall do this at their own risks and liability.

How and when to add fuel system cleaner

  • Start by replacing your fuel filter. It is not advised to use such additives in a fuel circuit with a fuel filter that aged for more than 1,000Km.
  • All petrol additives are to be just poured into the gas tank prior to refilling it completely.
  • The injector cleaner bottle is shaped on purpose with a long neck or an adapter is supplied as shown below in a manner that its tip pushes the flap inside the gasoline filling tube.
  • Let the fuel cleaning liquid flow till the bottle is empty, a matter of 20 seconds.
  • Fill your gas tank to the max and drive normally.
  • Repeat after each fuel filter replacement or every 10,000 Km.

Using fuel injector (system) cleaner on a direct injection engine

Petrol system cleaning additives clean the whole fuel circuit in addition to the inlet valves in indirect injection engines.
Be aware however that it has no effect on the inlet valves in direct injection engines since the injection occurs downstream the valves.
Visit our specific page for mechanically decarbonizing a direct injection engine for more details.

Unwanted effects of fuel injector cleaners

If your engine consumes a lot of oil, be aware that adding fuel system cleaners to your fuel tank will result in a lot of smoke getting out of your exhaust when acceleration from idle. 
Avoid using the fuel injector cleaners on oil consuming engines.

Buy fuel system / injector cleaner

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