I was a tech for Nissan in my previous life. I saw Nissan warranty an engine that had a rod knock at 60k miles with a customer that had one service ticket from her first oil change at less than 10k miles. She admitted that was the only time the car saw a service department. Nissan didnt even fight her on warranty. Turns out, per case precident, a single oil change is a "sufficient attempt at maintenance" and she would have cost more in litigation than the reman'd VQ35 that I installed.