i done a stat on it when i 1st bought it. i put another £40 in and drove from london to norfolk and back and when the light come on i hit 240miles!!! so 110 miles more than last time... ok alot of it was motorway but alot was also traffic etc. so that works to 35.4 mpg. thats a bit of a difference. maybe the fuel i got was pisswater!!