Rising fuel prices are pushing some Australians to turn used cooking oil into homemade biodiesel to cut transport costs.

Videos showing drivers converting waste cooking oil into fuel have gone viral on social media as the cost of diesel continues to climb.

Experts say the process is possible for some older diesel engines but warn it can seriously damage modern vehicles and poses significant safety risks if done incorrectly.

Authorities also caution that producing fuel at home must comply with legal and safety requirements.

The trend highlights the growing financial pressure facing Australian motorists amid high fuel prices.

While homemade biodiesel may appear to offer savings, experts say it is not a practical or safe solution for most drivers.