Here's the latest UOA from Blackstone for my '05 Subie WRX. It's totally stock (no high boost). It appears that there is some excessive wear. Blackstone's comments and numbers are below.
I'm obviously concerned about the wear. Any input would be greatly appreciated.
Lead, from bearings, increased so we can rule out a temporary particle streak as the reason for
lead. Lead's wear rate (ppm/mile) also increased, so it appears there is excessive wear occurring. We don't
know if you are running higher than normal turbo boost, which can affect bearing wear, but let us know if
you are. To try and bring lead down, you can a short oil change (~2,500 miles). That can reduce the
accumulation of bearing metals in the oil. Other wear was okay. The trace of gas isn't an issue, and no
antifreeze or moisture was found.
PP 5W30
4915 miles on oil
82,369 total miles
5/31/09 sample date
Aluminum 2
Chromium 1
Iron 8
Copper 2
Lead 13
Tin 0
Molybdenum 56
Nickel 0
Manganese 0
Silver 0
Titanium 0
Potassium 2
Boron 32
Silicon 5
Sodium 2
Calcium 3638
Magnesium 17
Phosphorus 790
Zinc 963
Barium 0
I'm obviously concerned about the wear. Any input would be greatly appreciated.
Lead, from bearings, increased so we can rule out a temporary particle streak as the reason for
lead. Lead's wear rate (ppm/mile) also increased, so it appears there is excessive wear occurring. We don't
know if you are running higher than normal turbo boost, which can affect bearing wear, but let us know if
you are. To try and bring lead down, you can a short oil change (~2,500 miles). That can reduce the
accumulation of bearing metals in the oil. Other wear was okay. The trace of gas isn't an issue, and no
antifreeze or moisture was found.
PP 5W30
4915 miles on oil
82,369 total miles
5/31/09 sample date
Aluminum 2
Chromium 1
Iron 8
Copper 2
Lead 13
Tin 0
Molybdenum 56
Nickel 0
Manganese 0
Silver 0
Titanium 0
Potassium 2
Boron 32
Silicon 5
Sodium 2
Calcium 3638
Magnesium 17
Phosphorus 790
Zinc 963
Barium 0