I have had car for a year and what i am talking about is the distance travelled on the same amount of fuel we use litres and klms here so i kept it simple as even though i am old enough to remeber miles and gallons i am not smart enough to be able to convert accurately. I used to get 400 klms from the same amount of litres put in tank that i now get 200 klms from not good!!!!!
I dont trust the fuel gauge or temp gauge but i have kept a log of the fuel usage .