before you get all paranoid...check this out
my car was doing the same, blowing smoke and oil out the dipstick tube, especially at idle, and the idle was really lopey like a cam, and the vac gauge sittin at 10hg in park
right before we were gonna tear into the ic tubes and reseal them and i also had bad feelings about rods and such, we found a hose that had come disconnected from the underside of the inlet plenum. we plugged it in, took a little fiddling with it but after 5 mins or so we got it back on, topped off the oil (it was 1/2 qt or so low cause of blowing it out) and the car idled perfectly, no smoke, no dipstick problems, no ****** idle, and its been that way now for over 2 months.
so check that vac hose thats on the underside of the inlet plenum.