We’ve made AdBlue diesel exhaust fluid available at selected Caltex truck stops around the country to assist our commercial customers with reducing their fleets' exhaust emissions.

Diesel Exhaust Fluid (DEF) is injected into the exhaust system (from a separate on-board tank) for use with Selective Catalytic Reduction (SCR) technology, and helps customers reduce exhaust emissions from their fleets.

SCR is used in many trucks, buses and other diesel vehicles meet the stringent Euro IV and Euro V emission requirements by reducing the pollutants released when the fuel is burned.

AdBlue, our choice of DEF, is available at Bombay, Otorohanga, Wellington, Rolleston and Invercargill truck stops and can be purchased using your Z Business fuel card.

For more information about our DEF or how Caltex can help you manage your fleet's fuel requirements please email our customer services team at and we’ll get straight back to you.