Here's a link to my factory fill UOA after 3560 miles. Factory Fill UOA Factory fill replaced with Wolfs Head HD 5W/30. I followed Terry Dyson's recommendation to run two relatively short drain intervals, and then sending a sample for him to analyze. Here is what I did after the first OCI in the form of Terry Recommended/what I did. 1. 1500 miles/1507 miles (used Cam2 5W/30 - Free oil change from Subaru) 2. 2500 miles/ 3022 miles (sent sample to Dyson for analysis.) Here are the results (Factory Fill UOA/Current UOA): Miles On Oil: 3022 Total Miles: 8091 Make-up Oil: None Iron: 68/10 Chromium: 1/1 Lead: 15/1 Copper: 272/31 Tin: 26/0 Aluminum: 28/3 Nickel: 0/0 Silver: 3/2 Silicon: 117/12 Boron: 164/117 Sodium: 164/7 Magnesium: 22/14 Calcium: 2092/1639 Barium: 16/3 Phosphorus: 1150/937 Zinc: 1348/902 Molybdenum: 898/74 Titanium: 0/0 Vanadium: 0/1 Potassium: 0/0 Fuel: <1/1.51 Vis @ 100C cSt: 9.35/8.6 Vis @ 40C cSt: 52.0* TAN: 1.36* TBN: 2.6* OXID: 13* NIT: 8* Water: 0 KF: 1353* Soot: 0.03* vndx: 143* Glycol: 0* Coolant: NO * Not analyzed prior to current sample Terry stated that his tests show larger particle sizes than that of Stavely, which could represent an even more significant decrease of certain metals, etc. I did not burn a drop of oil over the entire OCI, which is good. Fuel dilution seems to be a problem. Just goes to show that Subaru's Severe service intervals for all Turbo-charged cars is pretty applicable if you're using the run of the mill dino 5W/30. I've got Rotella 5W/40 in there now, and may change based on Terry's recommendations. Any other thoughts?