I have a 2001 Dodge Ram 2500, with the Cummins of course. I ran across a site that advertises a kit and an additive that will allow vegitable oil from restaurants to run any diesel engine. I know that the 2001's are not made to run on biofuel, but what this site advertises is called biofuel no. 2. This seems to good to be true, but it would be nice if it were. The site is Biofuel Basics : Revolutionary new biofuel that runs cleanly in any diesel engine without engine modification!. If anybody knows anything about this site and their products I would greatly appriciate any information. If it ends up working, then I might just get to keep my truck. Thank you for your help.