So oil is leaking onto your floor??? Or is it just getting burned up in the cylinders?

If it's cylinders I say try a compression test. You can go rent a tester from most auto parts stores, if you have no oil in the coolant.

If it is leaking on your floor...maybe a blocked line, a leaky line, a turbo. I once had a VW that the pcv valve was blocked and the oil puked out of the dipstick cause of an excess of pressure in the case. Caused me all kinds of smoke problems but that was because it was puking onto the manifold haha.

You have peaked my interest. Keep us posted. And don't cave and sell the Paj. Frontiers are ok with lifts and ARB bumpers but a buddy has one and he is always having some howling issue from the back end everytime he goes off pavement. Nissan has never been able to figure it out cause it goes away on its own. And, it doesn't wheel like a Paj...Its way to comfy.