Cooking oil, once heated, changes in molecular structure. Oil that has been reheated and reused has been determined to be unsafe for human and animal consumption with carcinogenic properties.
All fuel systems in all diesel engines imported, assembled or manufactured in South Africa are warranted for use with a B5 or 5% biodiesel, provided that the biodiesel conforms to the biodiesel specification SANS 1935.
Biodiesel blends e.g. B20, perform very similar to low sulphur diesel (50ppm) and ultra low sulphur diesel (10ppm) in terms of power, torque and fuel consumption.