Just an update from me also. It went down to half a tank on bang on 175 miles. The petrol light comes on when theres those two little bars left, so three bars to go. On the basis that the last three bars have gone for exactly 40 miles each, but that normally the last full bar seems to go a bit quicker than the rest, then I'm guessing that I should easily get more than the 230-250 that I'd normally get, but it could be touch and go as whether or not I get to break through the 300 mile barrier before the petrol light comes on.