O.K. I accessed my account, but I couldn't fine out much:
V100 was listed as Viscosity 100 (?)
OXI was listed as oxidation (again (?))
NIT was listed as nitration (even more (?))
I hoped this helped, it's still somewhat new to me.
Here is a link to the lab I'm using, it lists TBN\TAN in the units of testing, but I'm not finding it in my report.:
http://www.cashmanequipment.com/Units-of-Testing.htm