BIOFUELS: Restaurants see spike in thefts of used cooking oil Published: Tuesday, June 3, 2014 Nationwide thefts of used cooking oil from restaurants more than doubled between 2005 and 2012, an industry group says. Please subscribe to Greenwire to read the full story. Username: Password: Forgot your access codes? Recover them. Not a subscriber? Sign up for a trial. Ready to subscribe? Click here.