2012 Subaru Legacy Owner's Manual - Page 226

3-8 Instruments and controls The gauge may move slightly during braking, turning or acceleration due to fuel level movement in the tank. If you press the trip knob while the ignition switch is in the "LOCK" or "Acc" position, the fuel gauge's dial will light up and the needle will indicate the amount of fuel remaining in the tank. If, while the fuel gauge needle is indicating the amount of fuel remaining in the tank, you (a) do not press the trip knob for 10 seconds or (b) open and close the driver 's door, the fuel gauge needle will drop to the "E" position and the dial and needle will turn off. gauge. This indicates that the fuel filler door (lid) is located on the right side of the vehicle. Displayed unit MPG l/100km Needle position "+" side Better Poorer "-" side Poorer Better & ECO gauge NOTE . The ECO gauge shows only an approximate indication. . After resetting the trip meter, the average rate of fuel consumption is not shown until driving 0.6 mile (1 km). Until that time, the ECO gauge does not operate. NOTE 1) 2) U.S. spec. models Except U.S. spec. models The ECO gauge shows the difference between the average rate of fuel consumption since the trip meter was last reset and the current rate of fuel consumption. The ECO gauge indicates the current fuel efficiency as shown in the following chart. You will see the " " sign in the fuel