This is probably more related to the 3rd Gens however I think the the filter is the same from 2000-early 2007. Friend was at Cummins NW. CNW claimed to have received a memo stating the 7micron rubber gasket is not compatible with bio-diesel. I haven't seen an actual statement from Cummins. If you're running bio call Cummins to verify. The 10micron is safe for continued bio use.