Horrendous mpg on the bosch?

[Tom]

Nope no v power... i dont use supermarket stuff though :/ I havent worked it out but fuel light on i put 10quid in and pressed the reset on mile thing and then 36 miles later lights back and needles way into the white block on the empty side now that aint right.. my friends zetec s does 50 miles to 10quid easy :/