Ah I see thanks for the help I will get back to you tomorrowSorry, what I meant was, if you have so much fuel in the engine that it's coming out of the intake manifold at the head, it's probably going past the piston rings into the oil and watering it down. Making the oil less lubricating.
But, if fuel is coming out of the intake manifold, that means there is a gap at the head to manifold flange and you have a vacuum leak. Vacuum leaks after the throttle body on these MAP engines will make the ECU confused to how much air is coming in vs fuel. But that would mean lean running, not rich. O2 sensor compensating? Dumping in more fuel. I'm not sure.