2006 Subaru Outback ej253 and 4EAT hit 425,000. From 0-100,000 miles it saw pennzoil platinum. From ~100,000-350,000 it saw rotella t6 (I know, I've come a long way) from 350-378k it saw Mobil 1 0w40 and Castrol Edge 0w40.
I rebuilt the short block at 378k. Thrust bearing came apart in layers. Fatigue failure. All other bearings minimal wear. Piston rings gunked up pretty good, but what else to expect.
378k-425k mobil 1 0w40, 0w30 afe, Quaker State Ultimate Durability 5W30, HPL 5w40.
0-378,000 miles was 3-4k oil changes.
View attachment 331783
View attachment 331784