Fossil Diesel, Biodiesel, HVO & SAF: What's the Difference?

Not all diesel is created equal. As Australia moves toward lower-emission transport, fleet managers, sustainability teams, and procurement officers are increasingly encountering terms like "renewable diesel," "HVO," "biodiesel," and "SAF." These fuels can look identical in a tank but differ enormously in their chemistry, emissions profile, engine compatibility, and regulatory standing. Here is what you need to know.