depends where u live my friend, if u live in a town like mine with lots of traffic lights, cues, etc, then doing 30-40 mph normal round town id expect a 28-30 mpg, or something like cornwall where traffic lights dont exsist then 32-34mpg, on a round , or motorway its really good, my will do at 70mph just on 40 to the gallon. i used to drive a pug 407 diesel turbo that used to same 10 mpg better in all envioments but in all honesty, depends how you drive it, a fuel tank got me 300 miles on about £45 fill up on super unleaded. if you can train your right foot not to hit the gass at every opitunity then, it has a good economy considering its performance. 3 weeks in having mine, i cant get enough of it,watching people stop and head follow u, FORD ST'S are common as hell, honda civic owners want the gti, its the best thing going in the hot hatch market by far my friend. go for it!!!