i have a k reg ford fiesta LX done 93000 miles and its doing a pathetic 30mpg where it should be at least 40 i have inflated the tyres to their recommended pressure there isn't much clutter in the car and its been serviced recently (by myself) so i can't really think whats up, (oh and i am driving gently not wheelspinning or driving at 70mph in 3rd gear..)