Oil around intake manifold (pics)
 

I was taking out my air filter to service it and I noticed some oily residue around the plumbing going into the intake manifold. Any idea of where it is originating?

http://i100.photobucket.com/albums/m...y/P4190047.jpg
http://i100.photobucket.com/albums/m...y/P4190045.jpg

Tube from the AOS?
 

Look at the throttle body and the intake tube downstream of where that ~1" tube enters and see what you find in there.

Instructions are on Pedro's web site for cleaning the throttle body and mine for replacing the AOS.

Thanks Mike, I'll take a closer look at that and see if it could be stemming from the AOS tube, however, I just went back down to investigate and I noticed my power steering fluid is low and the cap was all sticky/gunky. The dipstick is bone dry so that's not good. I can't tell how the fluid could've leaked out yet.

I do know I need to top it off with some fluid. Is there an ok alternative to Pentosin the local auto stores carry? I don't think they carry Pentosin CHF 11 S.

Errr...I did some checking and it looks like you shouldn't mix brand X with Pentosin 11S so I'll have to order some. Found one of MN's old posts where he linked a place that sells it for $18 a liter which is cheap for this stuff. I still don't know exactly how this stuff leaked out or if that is PS fluid on the manifold. I haven't noticed any issues with the steering so it looks like I caught it before problems developed. The cap was on tight so I don't know how or where it got out. I'll just have to refill and keep an eye on it.

There is a breather hose connected to the power steering resevoir which vents to atmosphere. The fluid could be coming from that, though its only an overflow if the fluid overheats if I remember correctly.
And you are correct, don't mix Pentosin with any other fluid.