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Old 05-07-2005, 03:21 PM   #20 (permalink)
ThatPreludeGuy
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Join Date: Dec 2000
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Quote:
Originally Posted by TimeRacer
Why would high iron be from a crappy oil filter? Unless you think the steel plates inside the oil filter are oxidizing or something and putting the iron residue into the oil mix. I'd highly doubt that from ANY reputable oil filter company.

The TBN is really needs to be based upon what the oil starts with. I know Mobil 1 (Tri-Syn and the previous gen ... Syn.. something) were around a 12.8 TBN to begin with. You really don't want your TBN to go into the 2's generally (1 and below is the uh oh level) as the TAN (acid instead of base) generally ends up being around 1.2-1.8 for most oils. So I think you should be fine w/ another 1500 miles.
No clue thats why I was asking, my thoughts were perhaps it was allowing iron to pass through more then normal and stay in the oil rather then filtering it out. To be honest I'm a total newbie at reading these reports and wanted to get a feel for my baseline test so I have an idea of what to watch and or change for my next one. I'm going to switch at 6k again and watch the replacement oil so I can compare apples to apples.
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