Whisky 'petrol' for cars developed by Edinburgh Napier university.
It is the result of two years work by the universities biofuel research centre.
The £260,000 project was funded by Scottish Enterprise's Proof of Concept programme.
It has been welcomed by WWF Scotland's director Dr Richard Dixon who said it would help a "clean environment" industry to reduce transport emissions.
As part of the research, the centre was provided with samples of whisky distilling by-products from Diageo's Glenkinchie Distillery in Edinburgh.
The team focused on the whisky industry to develop biobutanol, the next generation of biofuel which gives 30% more output power than ethanol.
It uses the two main by-products of the whisky production process which are "pot ale", the liquid from the copper stills, and "draff", the spent grains.
Each year the whisky industry produces 1,600 million litres of pot ale and 187,000 tonnes of draff.
Unlike ethanol, the nature of the innovative bio-fuel means that ordinary cars could use the more powerful fuel, instead of traditional petrol.
The university plans to to take the new fuel to market in the bid to make it available at the pumps.
