Suddenly my BMW had a rough engine on start, white/gray smoke out of tailpipe

What is your question?

I recently fill up the tank and since putting in that gas the car has gone haywire. It's too coincidental that this started with the fill up. Oil change was done 1 week ago, GoodYear gave it a clean bill of health. Took two long distance trips (each +6 hours driving each day - ran like a dream). Filled up because I had to at mini-mart, 93 octane, but engine ran rough the next morning. No acceleration until it is very warm (after running 10 minutes it seems to work fine, except not today). Sputters and shakes like I'm lugging down in a high gear. Error codes are (from my handheld): MIL DTC 2-18-2012 P0301 Cylinder 1 Misfire Detected Stored Codes P0139 O2 Circuit Slow Response (Bank 1, Sensor 2) P0300 Random/Multiple Misfire Detected P0301 Cylinder 1 Misfire Detected P0303 Cylinder Number 3 Misfire Detected Pending Codes P0139 O2 Circuit Slow Response (Bank 1, Sensor 2) P0159 O2 Circuit Slow Response (Bank 2, Sensor 2) P0300 Random/Multiple Misfire Detected P0301 Cylinder 1 Misfire Detected P0303 Cylinder Number 3 Misfire Detected P0306 Cylinder 6 Misfire Detected (from yesterday) MIL DTC 2-17-2012 P0301 Cylinder 1 Misfire Detected Stored Codes P0140 O2 Circuit No Activity Detected (Bank 1, Sensor 2) P0300 Random/Multiple Misfire Detected P0301 Cylinder 1 Misfire Detected P0302 Cylinder Number 2 Misfire Detected P0303 Cylinder Number 3 Misfire Detected Pending Codes P0302 Cylinder Number 2 Misfire Detected P0303 Cylinder Number 3 Misfire Detected P0420 Catalyst System Efficiency (Bank 1) Below Threshold The exhaust smells like gasoline, so there must be incomplete combution. I'm planning to take it in, it's under extended warranty. The shop isn't open until Monday, so I thought I would post to see if I can get any upfront knowlege prior to taking it in under warranty.