This is the second UOA on this car. I went Stage 2 (turbo-back exhaust upgrade and ECU reflash to 16 psi boost) last October. I'm happy to see there's no detrimental effects of the modifications to this point. I switched to Red Line after the first UOA (Royal Purple) and I'm glad I did. I'm convinced that world peace could be achieved if everyone used Red Line. Air Filter: Cosworth Oil Filter: K&N Make Up Oil: none (and no oil used) Info presented is as follows: Oil Used: Red Line Royal Purple (5w30) miles on oil: 4,000 3,300 miles on unit: 22,000 6,207 Sample Date: 07/26/09 03/11/08 (red line/RP/universal averages) Aluminum 2/7/4 Chromium 1/1/1 Iron 7/11/9 Copper 2/6/9 Lead 0/1/4 Tin 2/1/0 Moly 661/181/58 Nickel 0/0/0 Manganese 0/1/1 Silver 0/0/0 Titanium 0/0/0 Potassium 3/3/2 Boron 25/25/44 Silicon 17/24/13 Sodium 19/9/16 Calcium 2552/2260/2287 Magnesium 9/1053/165 Phosphorus 1122/782/731 Zinc 1448/887/889 Barium 0/0/0 SUS viscosity @ 210F 60.5 (RP was 53.1) cSt Viscosity @ 100C 10.36(RP was 8.22) Flashpoint 395 (RP was 365) Fuel % <0.5 (prev UOA: TR) coolant 0 water 0 Insolubles 0.3 Blackstone comments: Nice improvement in wear and silicon. This drop is a very good sign that your Subaru is well past wear-in now and free of any mechanical problems. The physical condition of the oil was better as well. The viscosity was normal for a 5W/30 oil and the flashpoint was fine, so fuel dilution isn't an issue anymore. Silicon still reads a little compared to averages, though this is not a problem. Red Line oil uses some silicon as an anti-foam additive, so this isn't form dirt. No coolant was found and low insolubles show good oil filtration. Nice report at 22,000 total miles. I'll be staying with OCIs no longer than 4000 miles.