Van

I don't post a whole lot in this forum because my 996 runs so damn well. I don't have a lot to offer in fixing stuff because I haven't had much work to do!

I changed the oil last week and used Blackstone Labs for an oil analysis for the first time. I thought I'd share the results:

Ahsai

Thanks for sharing an it looks quite healthy for 6k oil use. Don't quite understand why they said Aluminum doesn't track with mileage though. I thought all metals do since virgin oil should have 0 metal in it.

Van

Yeah... good point.

relinuca

I use Signum Oil Analysis, a Mobil company, and their measurement criteria aligns nicely with Blackstone.

FWIW, in re. my '99 w/68K miles and annual oil changes w/about 6K miles each, my AL ppm typically runs 3-4. Once I saw a 7 after about 10K miles.

I view oil analysis like an annual physical exam's blood work up; i.e., look for changes over time.

relinuca

KrazyK

These are always good to review, thank you.

Macster

The oil analysis does look pretty good.

A very large percentage of the internal engine surfaces swept by the oil is aluminum.

Any bit of alum. flashing that comes loose will invariably end up going through the oil pump and being pulverized.

This can happen immediately after an oil change, just before an oil change, or it may not happen at all the whole time the oil is in service.

There is also the chance a bit of alum. flashing trash in the oil sump gets ingested by the oil pump and this can cause a bump in the metal content of the oil, alum. in this case.

soverystout

To add another report to the pile, here is my report from last week:

chadmartin512

Oh yea? Look at mine