The lifespan of an AdBlue® tank depends on several factors such as the capacity of the tank and the driving habits. A standard lifespan is given by the manufacturer but your driving will affect this.
The lifespan of AdBlue® in your car given by the manufacturer varies according to the tank capacity (from 8L to 30L), the type of driving (sport or not) and the nature of driving (short or long trips). Indeed, very stop-start urban driving will consume more fuel than motorway driving. Thus, the mileage given by your manufacturer remains an average. Today, it is necessary to fill up once or twice per year with AdBlue®. The evolution of the European standard Euro VI may imply a more significant recurrence in the frequency of filling up to around 4 or 5 fill-ups of diesel.