I'l l bet 67.9% of everyone here reads these threads and, like me, says high TBN, Low TAN, Zinc, etc has not 1 clue as to what is being discussed. I am tired of being ignorant so I found some simple articles that give some understanding of for what and where all you Babylonians speak.
Should be required reading for all BITOGers
http://www.blackstone-labs.com/do-i-need-a-tbn.php