I have kept a log of all fuel fills with mine since delivery in October 2004. I created an access database that produces various reports. This one is a graph of all the fills dropped into a MS Word file. I live in a country town in WA. The graph shows an obvious distinction between around town and highway driving. Included is a trip across the Nullabor to Melbourne and back. I have done quite a few trips to Perth as well.fuel.doc I drive reasonably conservatively but have been known to give it a bit, particularly when passing road trains - working on the theory of being on the wrong side of the road for a minimum of time. Hopefully this uploads OK because MS Word is not working on this computer