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Re: Fuel filters: what's going on here?!?
Could also possibly be the result of the fuel oil containing amounts of reclaimed 'biofuel' made from used cooking oils. The chemical responsible would be the contaminant - oleic acid, a well know 'problem' in fuel oils made from and blended with reclaimed 'cooking oil'.
If such is the case, then you will also find that the 'gaskets' and O-rings made from BUNA or Neoprene would be 'softened'.
On most filters with this type of physical configuration, the 'sump' is on the upstream side of the pleat pack; therefore, such flakes and debris would be captured on the pleats, but not the 'dissolved' nor particulated debris that is much smaller than the ÁM rating of the filter media, but surely would help to 'choke' the flow of oil if and when they did break loose.
Last edited by RichH; 09-04-2014 at 10:32 AM.