So far in this year:
2005 Legacy GT, 5k OCI
Out: Castrol 0w-40
In: Mobil 1 ow-40, Subaru filter
2010 Forester, 6.5k OCI
Out: Castrol 0w-30
In Castrol 0w-30, Bosch Filter
2001 Boxter, One year, 2.5k OCI
Out: Castrol 5w-40
In: Mobil 1 Mix: 5qts 10w-40HM, 3qts 5w-40 TDT, and 1.5qts 0w-40! Porsche Filter w/ new housing.