The wife called me today and said when she started the FX up, the gas gauge read dead empty. She knew she had at least 1/4 tank. On the fuel economy screen it showed 100 miles to empty. So, knowing the sometimes wackiness of these "technologically advanced" vehicles, and hearing my daily stories about crazy electronics in general, she turned off the FX and started it back up, and the gauge then read fine. Sure is strange.