I run my Land Rover almost solely on commercial Biodiesel.

I can recommend http://www.biodieselcommunity.org/ and http://www.utahbiodieselsupply.com/ as starting points!

I just saw a science blurb in the Washington Post (it's in the A section on Mondays) about making biodiesel from old coffee grinds. I googled and found a link to the ACS paper. Click on the "View" links to see the whole paper in various formats.

I'd rather recycle my coffee grounds into chef's or mechanic's soap.

So has it been heating the residence this winter?