Filling up with vegetable oil – can you drive a car on used deep-frying oil?

Deep-frying oil instead of diesel for your car: does it work?

04:58 mins, end SRF 4 News: Latest Updates dated 9 October 2026

Source: srf. News online / Image: KEYSTONE/Gaetan Bally (illustrative image/19 May 2026)

High diesel prices are sparking ingenuity: in France, some people are filling up their cars with used cooking oil, according to French media reports. But is it suitable as a fuel? Christian Bach, who works on vehicle systems at the Swiss Federal Laboratories for Materials Testing and Research (Empa), explains just how suitable it is.

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