So long as you never intend to use your warranty on the vehicle...then go for it!
But seriously, do you really want to leave that oil in your engine for that long? Will the oil filter withstand it?
To a 15,000 mile oil change interval I say a big fat no! lol but then again, it's not my car Besides, your going to have to keep an eye on the oil level after awhile, buy a quart every now and again to top it off and replace the oil filter in that period perhaps once or twice. The only reason I see people do this is to save money. If you can afford an 07 Pathfinder...you can afford to take proper care of your vehicle with regular scheduled oil changes
I hope that didn't come out the wrong way LOL