Hi all,
I saw this over at KeelyNet and wanted to share with you all.
The Richard Clem Engine was an engine that ran only on vegetable oil, and the vegetable oil only needed to be replaced every 115,000 miles.
Richard Clem Engine
http://keelynet.com/energy/clemreborn.html
http://keelynet.com/energy/clemindex.htm
http://keelynet.com/energy/clem3.htm
ETA:
http://hellboxer.blogspot.com/2009/11/clem-engine-reborn.html
http://www.micro-combustion.com/index.html
http://www.examiner.com/article/hydrosonic-molecular-accelerator-resurrects-the-clem-engine
http://pesn.com/2012/03/07/9602052_Hydrosonic_Molecular_Accelerator_Resurrects_Richard_Clems_Engine/
http://www.hasslberger.com/tecno/clem.html
http://www.rexresearch.com/clemengn/clemengn.htm
http://www.evert.de/ap0510e.htm
http://forum.davidicke.com/showthread.php?t=194311