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Biodiesel - Adelaide Metro bus fleet

Since 2005, Adelaide Metro has used biodiesel blends in its diesel bus fleet.

The desire to reduce greenhouse gas emissions and diesel fuel consumption while maintaining an efficient public transport system initiated a study of the environmental and economic benefits of biodiesel.

In 2002, a six month trial of a bus using a 20% biodiesel blend (B20), travelling over 25,000km, found the vehicle’s performance comparable to that on 100% petroleum diesel. Exhaust emission tests found reductions of more than 50% in particulates, 75% in carbon monoxide, 14% in methane and 1% in carbon dioxide.

In February 2005, following further successful testing, the Minister for Transport announced that all Adelaide Metro diesel buses would operate on 5% biodiesel (B5) and move progressively to B20.

There was no noticeable difference in the bus fleets’ fuel consumption or cost by shifting to B5 and B20, indicating that biodiesel blends are competitive with automotive diesel and can bring about cost-effective environmental gains. 

For more information refer to the Biodiesel - Adelaide Metro bus fleet fact sheet.

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