2006 6.0 with 158k mi. I have noticed oil leaking around the driver side intercooler tube. Its not enough to where it drips on the ground but i noticed it on the stabilizer shock from my lift kit. I also noticed that it was low on oil. I took it to a diesel shop here in town and they told me that it was my turbo going bad. Then I asked the guys in the shop where i work (i work on an ambulance) and they told me that if it was my turbo then i would notice decrease in power, check engine light, and notice a change on the boost gauge when driving. I havent experienced any of these. Im really not sure which to believe. Any help would be greatly appreciated.