An engine designed by a German engineer uses vegetable oil as fuel. Vegetable oil can be extracted from rapeseed, sunflower, soy or castor. Apart from being an alternative to oil, the atmosphere does not pollute, since the plant transforms CO2 into life through photosynthesis.
In France, by installing this engine on a Renault 21 a series of tests have been carried out, obtaining the following table.
The results on the duration of the engine will not be known until two or three years, but the data obtained so far must be considered positive