Britain's Prince Charles' Aston Martin runs on wine.
The Prince of Wales' DB5 is reportedly powered by bioethanol extracted from wine made at an English vineyard in Wiltshire.
Surplus wine from the estate is said to be sold to a local biofuel producer named Green Fuels for just one pound per litre and turned into ethanol.
Prince Charles, 67, reportedly worked with Aston Martin to enable the vehicle's carburettors to allow more fuel into the engine in order to help it run in a more environmentally friendly way, according to The Drinks Business magazine.
The royal blue car now runs on a mixture comprised of 85 per cent ethanol and 15 per cent petrol, with bioethanol estimated to produce 85 per cent less carbon dioxide than petrol.
Charles' classic car was a 21st birthday present from his mother, Queen Elizabeth II.
However, it is said to clock up just 300 miles a year at an average of ten miles a gallon, which is the equivalent of four and a half bottles of wine per mile.
The heir to the throne is no stranger to experimenting in order to help the environment as he uses wood-chip boilers at his Highgrove home and grass rather than grain-fed cows.