First oil analysis done by Blackstone labs, seems to be good.

[JB3]

I like Blackstone a lot. I do get the TBN and TAN only because I go longer between oil changes. Street use only between 8 and 10k and Blackstone has always said I could go more. At only 5 to 6k even with a couple driving events youre not likely to wear the oil out. On the other hand it's only 10 bucks.

A curious thought about the slightly high silicon: factory air filter or one of the 'high performance' so called oiled filters?

[Coaster]

Originally Posted by JB3

A curious thought about the slightly high silicon: factory air filter or one of the 'high performance' so called oiled filters?

Factory air filter replaced at 95K (I was catching up a 90K service interval).

[jb92563]

The numbers are nice to know but if you saw a divergent number would you know if its a problem and what causes it?

Is there a guide to oil analysis results or do they provide comments/suggestions when the numbers go out of spec.

Why would a car engine have so much calcium in its oil?

Too many one a day supplements? Coolant leaking into the oil?
I suppose you are what you eat so fossil fuel and lubrication oil makes sense for calcium.

And silicon from sand may be entering the induction system and accounting for some perhaps but doesn't steel
and other metals have a silicon component and perhaps that number really indicates wearing of parts or did the air vent in the lab introduce 1 part of silicon
or was their analysis device not calibrated that day (Is 1 part per million even signifigant?).

Are the actual numbers that important or is it the changes from your baseline that are really the most important thing to use as a diagnostic and preventative maintenance tool?

Just posing some questions to see how such data can really be used and if you need yearly reports or every oil change to make meaningful conclusions.

[Flavor 987S]

Originally Posted by jb92563

Why would a car engine have so much calcium in its oil?

Calcium is used as a detergent and dispersant additive to maintain suspension of particulate matter, along with maintaining a reserve alkalinity. Concentration levels vary greatly depending on oil brand.