AdBlue shows up as its own bowser or pump option at most Speedway stations, and if you drive a diesel it's worth knowing exactly what it does and whether your car needs it.
AdBlue isn't a fuel — it's a urea solution that's injected into the exhaust system of modern diesel vehicles fitted with Selective Catalytic Reduction (SCR) technology, and it converts harmful nitrogen oxide emissions into harmless nitrogen and water vapour before they leave the exhaust. Most diesel cars, utes and trucks built from around 2015 onward use SCR and need it; older diesels generally don't have the system at all and won't have an AdBlue filler.
If your diesel needs AdBlue, running it dry isn't just an emissions problem — most modern diesels are programmed to limit engine power, and eventually refuse to restart, if AdBlue runs out. It's a genuinely easy thing to overlook since it's topped up far less often than diesel itself; most cars only need a refill every few thousand kilometres.
Check your dash for an AdBlue gauge or warning light, or check your owner's manual for "SCR" or "AdBlue" — if it's fitted, keep an eye on the level the same way you would fuel. AdBlue is available at select Speedway stations alongside the standard fuel range; check the station page for your local Speedway before a long trip if you're running low.
