Here you go - Blackstone Labs

I usually get the results back (via email) in less than a week from the time I mail the sample.

 

$25 for a basic analysis, and $35 if you want to know how much of the addative package is left.

 

1991 XLH883

John

 

You'll get all of the data with the basic $25.00 fee. For the extra $10.00 they write up a descriptive summary that helps explain the data.*
Below is a report I had done a couple of years ago at 78,675 miles that includes the descriptive explanation (comments section).

Edit: that's the way it worked when I had it done 2 years ago.



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It's the extra $10 that gets you a reading in the TBN row. That's the reading on what is left of the known addative package in you oil sample.

 

Apparently their policy has changed over the past 2 years. The TBN used to be included in the base $25.00 fee, it was the explanation/written observations in the comments section that costs $10.00 more. Maybe they had too many people that didn't understand the raw numbers and traded the TBN test for the observation comments in the base fee. Who knows....