Car is running brutal rich

I can't figure it out. My car now that the blowers is on is running super rich. I haven't got it dyno tuned yet but my tuner sent sent me an SCT file that he says should make it run almost perfect. Fat chance. It runs worse than ever. I just replaced my front 02 sensors last night becuase they looked like they were in rough shape. I drained the oil last night too and there was gas in it. Too much cylinder wall wash I guess. Any ideas what could be wrong? I've checked for Vac leaks and can't find anything. I guess it just needs to be dyno'd real bad . I haven't run the car with the new 02's on it yet. It's one of those catch 22's. If I run it and it doesn't work I'll probably foul the new sensors and get more fuel into my oil again but i have to try it to see if it worked.