Great to find this place. When I got my new Q50 I asked the local Infiniti dealer engineer who was trained at the factory, about the break in. The answer: "just push it and go!!!". Well, I did. I love to be the first in the line, drive always in sport mode and go full throttle. Of course always with the engine warmed up. I did it for about 100 miles (got the car with 15 miles): 0-60 in 5.5 secs for several times, sometimes until 7.500rpm, and two times (just two and by mistake) I had the gas cut point reached (I know it works at 7.800rpm) trying to get used to the manual mode. No issues at all, great car, really amazing engine. After this amazing two days, and happy because an "engineer" told be, I had a really modern car that need no break in, BUT finally had time to read the manual... and there it was: break-in recommendations!!! Wanted to kill the advisor and myself. Well, of course lots of reading about Nissan quality, pre delivery tests and bla, bla, bla, still not a conclusion. I'm sure that the instructions are there for something, but I'm also sure that the brand will cover their back and avoid anything to go wrong during the first miles. Some other Nissan dealers, told me that I'll have no issues if after that the engine runs fine, and it really runs great... no noises or rattles or leaks. They also told me that the engine is well built and the chances to have an issue are almost zero, including durability. I'm planning to keep the car for at least 6 to 8 years (that means something about 100,000 to 120,000 miles). Any thoughts? Should I begin now to be more gentle? Should I take this my car was in some test drives (as many others) and get over? Well guys, you really know what is to buy a new car and love it. Yes, I should be more gentle with a new car, but hey!!! it has 330 horses waiting to be waken up!!! :) (I know I'm on pretty safe side, but some other experiences are welcome)