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Old 02-17-2014, 07:21 PM
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biobenz617 biobenz617 is offline
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Join Date: Jan 2006
Location: Denver, CO
Posts: 180
Contaminated Fuel?

I just changed my main fuel filter as PM and also inspected my prefilter. Only a few black specs in the prefilter and I left it as is. What I did notice is how dark/colored the fuel is. Take a look at attached.

Is this a sign of microbial infestation?? I thought diesel fuel was clear! I have not run biodiesel in a few years due to availability, and it was only high quality BlueSun stuff.
Attached Thumbnails
Contaminated Fuel?-fuel_sample.jpg  
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2002 Audi S6 Avant
1983 300D
1984 300D (sold)
1990 560SEL (sold)

Last edited by biobenz617; 02-18-2014 at 08:41 AM.
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