So, before my big trip, I decided to make sure the cooling system was well
bled and I opened up the cap to the tank (expansion tank?  The one NOT
behind the license plate) and the cap had a bunch of oil coated on it.  I
thought to myself, "that can't be good" but the van seems to be running
pretty good.

I've got 1500 miles to go in the next couple days.

Any ideas?
(I'll be on the road, so please email me at:
slchottamale@yahoo.com
)