Owner's Manual
Page 205
... the number of fuel remaining in traffic and making frequent stops, this menu item was reset. This number is calculated based on the number of mpg (L/100 km) recorded since the last reset of fuel is in the fuel tank. For example, if driving in the fuel tank. Fuel Used Press... amount of this menu item. Average Economy Press the trip/fuel button until AVG ECONOMY displays. This display shows the approximate average miles per gallon (mpg) or liters per 100 kilometers (L/100 km).
... the number of fuel remaining in traffic and making frequent stops, this menu item was reset. This number is calculated based on the number of mpg (L/100 km) recorded since the last reset of fuel is in the fuel tank. For example, if driving in the fuel tank. Fuel Used Press... amount of this menu item. Average Economy Press the trip/fuel button until AVG ECONOMY displays. This display shows the approximate average miles per gallon (mpg) or liters per 100 kilometers (L/100 km).