Diesel Cars & Trucks

Similar to any other diesel engine, diesel engines in cars and trucks can often be run on biodiesel or straight or waste vegetable oil. For small biodiesel blends (eg B10, which is 10 % biodiesel) often no modification is needed. Check with the manufacturer first.

Biodiesel WVO Car


Biodiesel can be made at home from easy to obtain materials, please click the tab above for more information.

Waste or Straight Vegetable Oil

This requires the installation of a second fuel tank in your car or truck for the vegetable oil and separate fuel lines to the engine. Vehicles running on vegetable oil must be started on conventional diesel or biodiesel first and then switched over to vegetable oil once heated up. Similarly they should be shut down while running on conventional diesel or biodiesel.

Popular Models

Older vehicles are popular to run on biodiesel or WVO. This is because they have simpler fuel systems that use mechanical injectors at lower pressures than modern electronic common rail diesels. The fuel pumps are more tolerant of biodiesel and WVO and the injectors are less likely to clog up or reduce the atomisation of fuel.

Older Mercedes and VW vehicles are popular biodiesel and WVO conversions.

Road Tax

The government collects taxes on fuels. These are levied on fuels, so if you’re making bioidiesel at home and running your car or truck on public roads with it, you should be paying the excise tax on it. Check with the Australian Tax Office (ATO) about your obligations here.