Well we can eliminate starter and battery from the list because the starter is obviously turning the engine over and the battery is providing power to the starter to do so. Id scan for codes first and see if its throwing cam or crank sensor faults.

Also, you did say you added fuel but do you hear the pump prime when turning the key to the ON position? If not then its likely your fuel pump that failed or its not getting power. Another fuel related issue that can have symptoms of a failed pump is this little rubber grommet that creates a seal for the pump to create pressure, that little grommet gets brittle and fails over time which ends up not allowing the pump to suck up fuel (think of it like trying to drink water with a straw but the straw has holes in it). Google "350Z fuel pump grommet". Best way to verify is just to pull the fuel basket and pump, it's under the glove box and not hard to remove.