Fuel indicator

I recently purchased a 2015 Jeep Patriot 4x2 and I've observed something a little unusual with the fuel consumption and wanted to see if others have experienced the same. My fuel gauge seems to move quite rapidly from full down to the halfway point, covering only about 40-50 miles. However, it then takes much longer to go from half to empty, giving me an additional 120 or more miles. Is this a normal characteristic of the Patriot's fuel system?