Nissan's claims for your Pathfinder are 10.2 L/100 km average overall, and 12.4 L/100 km in urban situations. Using the latter figure as a guide your car is consuming around 30 percent more fuel than the company's claim. It must be remembered that the claim is taken from a standard lab test and not real life, and that it's meant to give a comparative figure when comparing one car to another, but to then find you car is guzzling 30 percent more fuel is unacceptable. Take it back to your dealer and demand something be done about it.