Eolys or adblue

[adbos1950]

Hello everyone, I have a 2013 Citroen c3 picasso and would like to know whether my car takes Eolys or adblue and where is the refill position

[GiveMeABreak]

Don't confuse the 2. They are for different systems!

Eolys
Eolys additive is for the DPF system to aid in regeneration and is automatically dosed into the fuel tank by the additive system whenever you add fuel. A DPF treats the particulate matter by trapping it in the filter and later burning this off - called regeneration.

Adblue
Adblue is a UREA based solution for the Selective Catalytic Reduction (SCR) system (if fitted to your car) that treats the NOx emissions and converts it to harmless water and Nitrogen.

So they are completely different systems and should not be confused with each other.

Your vehicle being a 2013 model very likely does not have the SCR system fitted, so you likely only require the eolys additive to be topped up when you get the warning on the dashboard and the message.

To be honest, and from your limited understanding, this should really be left to a competent garage to do, as it is gravity fed into the additive tank that is hidden away behind the rear fuel tank heat shields and then must have the engine ECU additive counter reset using a professional level diagnostic tool. You also must use the correct additive type for your vehicle and build date as some are NOT interchangeable.

[adbos1950]

Thanks for the advice, can I also use diesel Redex directly into the fuel tank

[GiveMeABreak]

Officially PSA 'forbid' using any other fuel additives as this may impact on the additive system, so I would only use it occasionally to clean the fuel system, as PSA vehicles have their own additive based DPF system, so it is not required to add any other type of cleaner.