2014 Pro 4 X I have always changed the oil at the dealer every 5K miles. Kept a new air filter etc. Always stayed on top of any maintenance tasks. Truck ran crappy one morning and threw a P0300 mulit cylinder misifire. Then it would run fine. I replaced the plugs since I figure why not at almost 90K they could use it. Used NGK plugs and it ran great for 2 days. Cold morning start it kind of stumbled on start up again and threw the cold once more. I drove it straight to the dealer and they said it has low compression 155-175 psi on all cylinders and that is why it is missing. The thing I find odd is that it runs just fine but intermittently has a stumble more like an electrical issue. I don't trust this dealership they offered to put in a used motor with 110K miles for only $5,400. I have it at an small independent shop now looking at it hoping it is just a crank sensor or something that is an easy fix. Has anyone else had a similar issue? Did Nissan do anything for you/?