I don't know if it was a good idea vouching for the kid, Like ben said, he is been caught in countless lies. One being that he claimed in his forsale thread that he got rid of it and bought a 2011 STI. 2 Days later he puts up thread on nasioc asking about oil in his FMIC.
http://forums.nasioc.com/forums/showthread.php?t=2128941
He is running a grimmspeed AOS, which under normal conditions, it would handle normal amounts of blow by. I am running a Prova AOS, which is similar to Grimmspeed and I have not seen any oil in the return line to the intake since I installed it. If he has a cracked ringland which creats excessive blow by the AOS isn't going to catch all of the oil. The STI's can run strong with a cracked ringland, some people have ran it for 10-20k miles but it will eventually lead to catastraphic failure. All the signs of the car leads to a cracked ringland. which is not uncommon in 04-07 STI's. The most important part is that that ZB from sigmatech did compression and leak down test, one of the cylinders is down in compression with a leak down of 30%.