[Halon]

You dropped in new pistons/rings without running a hone or anything? I'd definately say there's a chance that could be the root cause there. The rings may have never bedded in well and hense the increased blow-by.

Pop the head off, oil pan off, remove pistons and rods and run a quick hone up and down. Re-ring and see if that helps. Alothough I don't know Evo X's so I have no clue how difficult removing the head and oil pan is compared to a dsm.