roadstar

Hi Friends, i recently bought a hinda civic ek3, though it is supposed to be economical in petrol, mine does approx 8 kmpl. when i put it through the computer analysis, my car runs on open loop full time though all the sensors are working, but the oxygen reading shows 101.7 (it is supposed to 50 - 100). Please advice on what is wrong and what can be done to improve on its effeciency. Thanks and regards