i fillup every couple weeks usually by that time as soon i pull into the petrol station the light comes on while im waiting, once filled i reset the trip a soon as i get in the car. I dont know whats going on this week as i've used up a quarter already and i've only done about 60km, and thats driving like im driving miss daisy, sometimes i get good fuel economy (for my car atleast) some weeks i don't even though i drive the same, whats will the inconsistencies?!?!