here is your "analysis":
"©COPYRIGHT BLACKSTONE LABORATORIES 2001 LIABILITY LIMITED TO COST OF SAMPLE ANALYSIS
P.O. NUMBER CC: MC (Prepaid)
THOMAS: Thanks for the note. We don't normally consider it a problem to burn oil, as most engines
do. But if your engine's oil consumption rate changes, either increasing or decreasing dramatically,
that can spell trouble. As it is, we found high iron and lead, both coming from the bearings. We
assume the wear is due to the long oil change. GM engines aren't the best wearing out there, so you
may want to consider shorter oil changes to reduce wear. The TBN read 1.1, quite low & very little
active additive left. No contaminants (like fuel) found. Check back."
Let me be specific about why I am angry so everyone knows that my anger is based in logic:
-OK, first of all you say Iron and lead are "high". You never define "high". Why are they high? Is it because they are high for the universal averages in which the concentrations are comparred to those of people who change their oil every 3-5,000 miles? If this is the case, what is your threashole of Low-borderline-high, specifically, in ppm concentrations? To give a statement with absolutely NO justification is scientifically laughable.
- TBN is 1.1, very little addative left. What does this mean? Addative, to me means cleaning agents, moly, esters, acid neutralizing compounds? I am guseeing based on my own chemical experience that it is some sort of total base number. However, what is "LOW"? 10%, 20%, 50%? Where is the quantification.
-My viscosity was off the charts high, but no mention was given on your so called analysis.
-It seems that there could have been more said, but because the person wrote a personal note to me, he ran out of room, therefore, writing a note took presidence over given an analysis based in quantifiable rationalization.
You know, I waited 9 months and really anticipated getting some real data I could punch into an Excel spreadsheet and crunch, but all I got was an "analysis for dummies". Worse yet, I cannot even crunch my own numbers because I know nothing about how you derive yours. All in all, it was a complete waste of 30 dollars and more importantly, I am dissapointed and mad at myself for not realizing the scam.
Oh, and Finally- You made NO MENTION of a possible good oil change interval. You can say numbers are high because of a high interval, but come on, you need to give an average ppm/X muiles and if you refuse to do that, at least give a suggested interval. You short changed me, here.