Some fuel injector or fuel system cleaner wouldn't hurt. As for what may be 'stuck' to the inside of your intake, Seafoam Deep Creep would help a little, but short of taking-off the upper intake and washing it with something like Simple Green or Dawn, I don't think you're going to get the walls of it clean while it's still on the car.
Seafoam in the crankcase isn't going to make it to the same places as the oil residue would have. The PCV would have allowed the oil to saturate the intake manifold, then runners, then possibly the combustion chambers.
I always chugged beer, not oil. But that's just me......
