If you have oil through your intercooler it could mean 2 things. Turbo seals are bad which I think is whats happening or somehow your pcv system is shooting a crap load of oil through it which then goes into your turbo (not sure how but who knows).
Oil could pass through the turbo seals if you have a restriction in your intake. I doubt it but if the turbo is gasping for air its gonna start leaking through the seals.