
01-23-2011, 11:02 AM
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CC Member
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Join Date: Oct 2003
Posts: 4,078
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Not Ranked
Quote:
Originally Posted by bobcowan
The TBN read strong at 7.0,
lot of active additive left. Try 7,500 miles next.
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What does 'TBN' mean?-a sort of additive index?
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Chas.
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