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AdBlue: Everything You Need to Know About the SCR Additive for Diesel Engines

Since Euro 6 standards, most recent diesel engines (cars, heavy trucks) are fitted with an SCR (selective catalytic reduction) system that requires a specific additive: AdBlue.

2026-09-15·4 min read

How the SCR system works

AdBlue, a urea solution compliant with the ISO 22241 standard, is injected into the exhaust gases where it reacts to convert nitrogen oxides (NOx) into nitrogen and water, significantly cutting polluting emissions.

Which packaging should you choose?

  • AdBlue 5L — top-up for a private vehicle.
  • AdBlue 20L — light commercial vehicles and small fleets.
  • AdBlue 1000L (IBC) — heavy-truck fleets and logistics sites, with a dispensing pump.

What happens if the AdBlue tank runs empty?

On most recent vehicles, the system warns of a low level several hundred kilometres in advance; once the tank is fully empty, the engine may refuse to restart for regulatory (emissions compliance) reasons.

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Frequently Asked Questions

In Short

Does AdBlue expire?

Yes, store it away from freezing and excessive heat and respect the expiry date printed on the packaging.

Do you deliver AdBlue in IBC for fleets?

Yes, AdBlue 1000L in IBC is available with direct on-site delivery for heavy-truck fleets and logistics sites.

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