driving down the highway at 60mph, my engine shuddered, blew dark smoke,and just didn't sound right. at first i thought she was coming apart. slowing down to 50 it ran smother and the smoke changed from dark to light colored. i drove it home, about a mile and though it continued to smoke it seemed to run fine. once home, i raised the hood looking for the worst, the engine idled well and the smoking went away.everything seemed normal. i drove to my shop and started looking for a problem, the car had done this 2 days before. then i reasoned i had a bad batch of motion lotion so i drained it and replaced it with fresh from the hess station. sure that was it, i drove it for anther 40 miles with no problem before today's episode. now i was sure it was something else. just for the heck of it i checked the oil. whoa! the level was up over an inch and 1/2, i figure about a gallon at least. [definitely not coolant] motion lotion i suspect. i had just changed the oil less than 500 miles ago. pulling the resonance tube to start checking stuff i notice that there was a bunch of oil/fuel? in the bottom of the intake,3 to 4 ounces. what gives? where is this stuff [fuel] coming from? i'm sorta guessing that the crank stirred up the oil/fuel? bigtime and some got through the pcv valve into the intake, after enough built up a big wad was sucked in [hydraulic lock, i hope not] causing the smoke and mayham. but where is this stuff coming from?

thanks, hunt