Rookie "Is my turbo bad?" Question

[thom1301]

I just started modding my 90k-mile '96 AWD Talon. Yesterday I installed hard intake pipe and cone filter, hard intercooler pipes, Greddy RS bov, Hallman mbc, and a boost gauge. Car is otherwise stock. I noticed there was some oil in the intercooler piping. There seemed to be more in the upper piping than the lower. I have no experience with turbo cars, I don't know if this is just normal or if my turbo is leaking or what. Car boosts fine (now to 15 psi) and doesn't seem to smoke. Thanks for any help/advice you can give.