I was told by the parts guy at my local dealership that the lower oil pan is just siliconed, there is no actual gasket.
I have trouble with mine leaking because two prior owners ago it got bashed and that more than likely broke the seal. Pity I didn't discover this before I shelled out the Mobil One for an oil change.
I was going to get this fixed when I did my next oil change (which I was figuring, since the car had been sitting for a while it might be good to get done before I leave for Moab.)
VX: What your Murano dreams it could be...