it certainly could be bad seals which wouldn't be a total shock either, but replacing the PCV with one from a JDM milennia (i think) is a lot cheaper than building a turbo. another way to check to see if the oil is coming from something other than the turbo would be to put a fuel filter on the vac line i mentioned above. if theres buildup in the filter, its probably not the turbo, and is either PCV related, or you have a bigger issue with oil blowby in the engine. in either case, the turbo would draw the blowby into the intake.