Whats the most fuel you have got in the tank when filled up? being new to Copens I've not have to fill up much, this was third time and first was partly full. I was just under ¼ mark, till it kept clicking off, to full took 6 gallons, 27.5 litres. Now the tank is 8.8 gallons 40 litres. So is there about 2 gallons left on the empty mark? I'm wondering how far I can drive it when the light comes on?