black sludge in fuel filter but no oil consumption

[97psddrw]

i just changed the filters on my 97 psd , there was a good amount of black sludge on the fuel filter , i searched here and , found lots of suggestions about it being o rings on the injectors , but also that problem went along with oil consumption , my truck hasent used a drop of oil since i got it 500 miles ago

i also looked around the valve covers and theres no evidence of them being removed for a good while , so i figure this rules out as prevois o ring job being done ,

is there any other reason for black sludge , will a really old neglected filter have this ?????

according to the last techs writing on the air filter it hadnt been changed since 07 so im pretty sure the F.F is about that old , but i dont want to assume , all is fine ????????????????

[Patrick Feeley]

If it was black and slimy looking, it could be algae in the fuel (which can be treated with something like Racor Biocide). If it's running OK, you may want to run for a bit and check your filter again for any accumulation. Cheers!

[amstaffs]

I had the same issue a few months ago i found it to be a bad injector o ring i replaced the injectors since they had 390K and it has not happen again.

[jesilvas]

I'd change the filter, clean the bowl out really good, and run it a while and check again.