Restaurant owner to use his waste oil - Glass Nickel Pizza in Madison uses their waste oil to fuel...their pizza delivery vehicles! Talk about a closed (almost) loop system...

http://www.glassnickelpizza.com/$spindb.query.readwhat.gnickelview.31

Also See:

Restaurant Uses Waste Fryer Oil as Fuel 

Wednesday Sep 13 | Treehugger

A savvy restaurant owner in Pleasant Prairie, Wisconsin has found a way to put his waste fryer oil to good use .