Owner's Manual
Page 242
... driving conditions change even though the same amount of this display may read one number, but if the vehicle is driven on the number of mpg (L/100 km) recorded since the last reset of fuel is in the fuel tank. Average Economy Press the trip/fuel button until TIMER displays. ... the last time this menu item was last reset, not including time the ignition is off. This display shows the approximate average miles per gallon (mpg) or liters per 100 kilometers (L/100 km). Generally, freeway driving produces better fuel economy than city driving. This display can be counted as long ...
... driving conditions change even though the same amount of this display may read one number, but if the vehicle is driven on the number of mpg (L/100 km) recorded since the last reset of fuel is in the fuel tank. Average Economy Press the trip/fuel button until TIMER displays. ... the last time this menu item was last reset, not including time the ignition is off. This display shows the approximate average miles per gallon (mpg) or liters per 100 kilometers (L/100 km). Generally, freeway driving produces better fuel economy than city driving. This display can be counted as long ...