hey guys. my last thread was about a motor swap. i need to know if i even need to swap my motor out. basically, i have an oil problem. i.e, there is a layer of oil on top of every piston. i personally think it's rings. it smokes like a mofo, but runs great. 150k miles on the motor, and a preveious owner ran a NX kit. i think the rings have juss given out. what do ya'll think? how much would this cost to repair? i've found d series rings for like $120, but i thin kthe labor is what will kill me. any suggestions?