Interestingly enough, I checked my oil level today and it also stinks of rich running. Also Revo Stage 1
Did your car exhibit any kind of part throttle weirdness? A bit surgey, jolty and unresponsive? But OK in boost?
I think my injectors are going bad (again!) as the above is a classic sign of one or more injectors on the way out. Thought I'd drop that in here just in case you've got the same symptoms.
Basically, one or more injectors is dribbling causing a rich condition, which the lambda control fights, but also makes the working injectors run leaner as it only measures the sum of all 4 cylinders, not individually, hence the part throttle wobbles.
That would certainly make the engine oil stink of over fuelling.