yeah i'm burning some oil with my turbo also but i did a compression test after my near hydrolock last time and it was 195 190 190 190 so i'm not too worried. I also just dynoed 176 whp 173 wheel torque on 8 psi which are pretty healthy numbers so i should be ok

But dumping an extra quart of mobil 1 in every once in a while is getting expensive.

Nitrous is pretty harsh on your motor, i used to spray a 55 dry zex kit like you too and i burned oil back then also, not to mention shooting fireballs out of the exhaust (which destroyed my stock cat)