Here's my analysis after first oil change at 4,025 miles, and no more gentle than recommended break-in.
Element Actual PPM / Typical PPM
Result / Should Be
SUS Viscosity @ 210F: 48.6/46-56
cSt Viscosity @ 100C: 6.84/6.0-9.4
Fuel % <0.5/<2.0
Antifreeze % 0/0
Water % 0/<0.1
Insolubles % 0.2/<0.6
Comments: High wear and silicon are common finds in new engines, such as your new Impreza. The excess wear metals are from new parts breaking-in while silicon is from sand-casted parts and sealers used when assembling your engine. Both should improve with subsequent oil changes. Universal averages for this type of engine are based on an oil run of ~4,200 miles. With a few more oil changes your wear should read at or below universal averages. Subaru makes nice engines, so this should be a good one for you. No contaminants or problems found.