I have the same truck, except 2wd and a 5sp stick. I've also had this issue. In fact, last week I finally replaced the pcv valve.
On a side note, be sure to pay attention when removing it, and twist it counter clockwise (it has a little notch/key that needs to align with a little slot that's hard to see), and reverse the order with the new one.
A week later I'm still seeing a faint amount around the sides of that baffle plastic they keep in the oil fill cup.
Anyway, it's been in the mid 30's to mid 50's around here, so I assume that being plastic and cold on the outside, and hot on the inside the oil vapors are causing emulsion from condensation (why they placed it right in direct contact of a cold blast of air is beyond me).
Oil types probably don't mater from what I figure, but if they do I run Mobil 1 Full Synthetic.
Btw, I'm also not loosing or burning coolant from what I can tell.
Thursday, November 20th, 2008 AT 1:51 AM