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post #5 of (permalink) Old 09-14-2018, 12:53 PM
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Join Date: May 2002
Location: Gypsum, Co
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The black in the diesel oil is soot from the cylinder walls that gets washed off and into the oil. It is the filters job to get rid of it.

Hotshot would have nothing to do with cleaning the oil. Even their web site says nothing about cleaning the oil.

96 F250 PS XLT 4X4 long box, 5sp,4.10, manual hubs,pyro+boost guages, Dark Toumaline, add a leaf, Dale's TYMAR, and HX hose, downpipe, coolant filter, Luk clutch
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