OK-
Just got the oil analysis results for my 2004 WRX back from Blackstone Labs. Just to recap, I performed my first oil change at 3000 miles, and saved a sample to have analyzed.
The averages for a 2004 WRX seem to be exactly the numbers I have. I'm guessing that mine is the only one they've received a sample from so far. They do have "universal" averages, which I have in parentheses. I assume all numbers refer to parts per million (ppm).
ALUMINUM 4 (4) CHROMIUM 2 (1) IRON 30 (8) COPPER 45 (5) LEAD 8 (2) TIN 2 (1) MOLYBDENUM 894 (78) BORON 148 (101) SILICON 80 (7) SODIUM 6 (7) CALCIUM 1775 (2559) MAGNESIUM 10 (153) PHOSPHORUS 822 (797) ZINC 989 (931)
So - as Edward Hayes suggested, there appears to be a very high level of moly, whether it was a paste applied to the parts or an oil additive/ ingredient. I believe calcium is part of the detergent package. The phosphorous/zinc levels (ZDDP anti-wear additive?) seem to be close to normal averages. I asked Blackstone what the original oil weight was.
I got these comments:
"High wear and silicon are both common finds in oil samples from new engines. The wear is high due to break-in of new parts, while silicon is from sealers and sand-casted parts. Universal averages show typical wear metals for an oil from this type engine after 4400 miles use. We suspect your engine will look that good or better in two or three more oil changes. This was 5W/30 engine oil with no moisture or anti-freeze present. Check back to establish solid wear trends. Everything will look better next time around."