Here's the latest on my Legacy GT. The Rotella is proving to be a solid choice for this engine. The copper is still a bit high, but I suspect that is an interaction between the Rotella chemistry and the big, copper oil cooler. The fuel is a bit high likely because the warm-up for this change was all at idle while I changed the coolant and P/S fluid.
Report Date 18-MAY-09 Lab Blackstone Make Subaru Model Legacy GT Year 2008 Engine 2.5L Turbo F4 Miles On Veh. 30,016 Oil Brand Shell Oil Series Rotella T Oil SAE J300 10W-30 API SX CJ-4/SM Miles on Oil 3729 ~2 months in service ***Elements*** Aluminum Al 3 Chromium Cr 0 Iron Fe 5 Copper Cu 16 Lead Pb 1 Tin Sn 1 Molybdenum Mo 2 Nickel 0 Manganese Mn 0 Silver Ag 0 Titanium Ti 0 Potassium K 6 Boron B 24 Silicon Si 14 Sodium Na 4 Calcium Ca 2252 Magnesium Mg 8 Phosporus P 1107 Zinc Zn 1501 cST @ 100 C 10.9 SUS @ 210 F 61.3 Flashpoint 375 Fuel % TR Antifreeze % 0.0 Water % 0.0 Insolubles % 0.3 TBN N/A Additives None ***Filters used*** Air Filter Subaru OEM Oil Filter Subaru OEM Location Reno, NV USA