i would check your turbo oil return..its just a push in fitting and its got an oil ring..that could leak, or you may have it leaking from the feed on the top of the turbo...both are easy cheap fixes. the CCV mod is nothing more then taking the crank case hose and running it down the truck and exiting it pass your fuel tank. blocking it off where it comes up in your intake. that just helps keep oil out of your i/c pipes and what not. mine is rerouted and it still has oil in my pipes.
could be the Hpop but i would check the turbo out first.