Do you remember who you bought that commercial B100 from, leo? There have been problems with commercial users producing 'less than stellar' fuel. You may have been seeing soap precipitating out, or tallow precipitating out. Some low conversion fuel has been known to have junk settle out many weeks or months later, but this isn't typical of good biodiesel.

peace,
sam

__________________
"That f***in' biodiesel is makin' me hungry."

1982 300TD Astral Silver w/ 250k (BIO BNZ)
2001 Aprilia SR50 Corsa Red w/ 5.5k (>100 MPG)