Click and Clack
Click and Clack (the Tappet Brothers) on NPR are of the opinion that biodiesel, and especially WVO, will irreparably damage rubber seals and components of a modern diesel engine. (Check out their website at cartalk.com, search for diesel)
Anyone care to comment on the veracity of their opinions?
Otherwise, I love listening to their show and get a good chuckle every time I do.