Bill,

It's fairly common for diesel fuel that has been in storage for a long period of time to actually grow a strain of bacteria that will plug filters and injectors. It's a black gunky looking sludge, but this would be on the fuel side and would have no contact with things like engine internals. Could your 'someone' have his facts wrong.

EDIT. More stuff.
http://www.debugamericalatina.com/bacteria-in-diesel.html

Stuart

Last edited by atomarc; 03/22/2009 3:06 AM.