Prince Charles ' office reveals his car runs on biofuel made from surplus wine . Prince converted other cars to run on biodiesel fuel made from used cooking oil . Comment: Details of the prince 's biofuel use were made public Monday in his household 's 2008 Annual Review , which details the prince 's income and activities over the past year . The prince renown for strong interest in environmental issues and rural affairs .
Prince Charles ' office reveals his car runs on biofuel made from surplus wine . Prince converted other cars to run on biodiesel fuel made from used cooking oil . Comment: The prince renown for strong interest in environmental issues and rural affairs .