This is interesting problem. To start, the EGR has nothing to do with it as cruiser54 indicated. If you look this up some reading will say it is the same as the PCV valve, but without the metering valve on six cylinder engines. If you go someplace else, it is the Crankcase Breather/Filter. My Factory Manual has nothing on it I can find. My Hanynes book shows a drawing how the system works on a eight cylinder engine and shows that filter is where the air for the crankcase ventilation system is coming from, then exhausted through the PVC valve. The PVC shuts off when the intake manifold vacuum is the highest.
Now with all this said how does oil start getting pushed out that filter that air needs to get sucked in. What I do see in the manual is a check list of possible problems. One of them being to mush blow by. The other thing is I have never taken my covers off. There may be a roughting, by baffles or whatever, on the top of the cover of a 6 cylinder, My eight has the PVC mounted on the right valve cover and the crankcase vent on the left valve cover. One thing is for sure, raw oil in not apposed to be coming from it. This may be what criser54 in his "Something to check out:" post was talking about
If it was me first I would change the filter, whether it looked new or I got it last week. If that doesn't fix it I would do a compression check.