It cannot be 6-7kmpl in any case. Even a 2000 model surf does 6-7kmpl. A 1600cc optra ls gives around 9-10.. easily. I never had this car but the reason i knw the figures is once an optra owner bought Liana from me and after 6 months he was saying kay yaar mileage to same hai per maintenance mehngi hai optra ki. Beautiful car wasay if u can find one in neat condition.