Only thing that I can think of is that blown piston rings can create more crankcase pressure than the pcv can handle, but I doubt that's the cause. I'd imagine another seal would've gone. I suspect a few things. I like to use RTV on the outside of the seal. Only on the part that seals against the engine, not the crank (for the newbs reading, lol). However on the seal that contacts the rotating assembly, I like to use some transmission assembly lube. It's like a thick grease but it turns into a harmless liquid once it gets hot and mixes away in with the oil.. As I said, very little won't harm the oil/engine. Guess you could use oil, but oil doesn't protect as well during install. The seal can be damaged when sliding the seal over the rotating assembly. I've done this and I work in a shop. A seal can be rolled as well, especially if no lube was used initially. I'd suggest buy another seal and plan on replacing it. That seal should take some tapping with a hammer and flat object (like block of wood?) to install it straight and without damage. You'll probably find the problem once your in there. I've been there. We all have. Look on the bright side? lol U can do the same job but faster knowing what u got to do and what tools you'll need (= btw, sure it's not a oil leak from above thats running down? Cause most leaks do wind up as a drip of oil below the rear main. These do get leaky valve covers AND there's a sneaky little exhaust cam position sensor on the rear passenger side of the motor. They have 2 (1 or 2) o rings on the sensor that keep oil out and they can leak too. They will leak down the back of the motor and onto the transmission bell housing. Anyway. Keep us posted bro.