What colour is the FAP fluid?
What colour is the FAP fluid ?
Many of us live under the mistaken belief that the FAP additive fluid (also known as Eolys fluid) comes in as many colors as there are markings on the labels or snap-in connectors of the tank. As it turns out, this is one of the automotive myths. So what are the facts? In this article, we will dispel all doubts about the color of the FAP fluid.
If you are interested in the topic of FAP additives, also check out our guides:
What is the purpose of FAP fluid, and what is its chemical composition?
FAP system fluid is a special fluid for firing wet FAP particle filters in diesel cars. Wet filters, known as FAP, are found exclusively in cars of French brands Peugeot and Citroen (including models of other brands such as Opel, Ford, Volvo, or Toyota, where the PSA group had its technological input). In other brands, dry DPF filters are used, which do not require the presence of FAP additive to burn out.
FAP fluid is produced based on light oils with the addition of the cerium element. This fluid is injected into the exhaust system, where it aids in the combustion of soot and other pollutants at a temperature of approximately 300 degrees Celsius, unlike dry DPF filters at approximately 600 degrees Celsius. Lowering the self-ignition temperature of soot facilitates the entire combustion process.
FAP Fluid Colors
There are four generations of FAP fluid:
- EOLYS DPX42 - white/gray label
- EOLYS 176 / INFINEUM F7995 - green/brown label
- EOLYS POWERFLEX - blue label
- EOLYS EXTEND - black label
Does this mean that depending on which generation of fluid we use in a particular model of our car's tank, we can expect a bottle of FAP additive and additive itself to be of that color? Nothing could be further from the truth! Generations of fluids do not differ in color but in chemical composition, due to the introduction of new emission standards (Euro 1, 2, etc.) over the years. The color of the label and the snap-in connector on the tank is only an indication of the fluid generation. For example, gray or white indicates the first generation, black the fourth, etc. The fluid itself, regardless of the generation, has the same burgundy-brown color.
