ammarkhan87 my friend used to drive faisalbad to isb every weekend on 06 city and he upgraded lil bit such as 4 tip iridium plugs etc and getting 23+ milage on motor way at constant speed of 100 to 110 with 2 passengers
this is most fuel efficient car as well as cheap spare part specially in fsd
here is a good car for sale
https://www.pakwheels.com/forums/vehicles-bikes/208781-sale-honda-city-2006-a
and i not this one then go for vtec steermatic us ki average thori si idsi sy kam hai but automatic + 7 speed virtual gear box give a pleasure to drive
and good milage of idsi is due to its technology idsi stands of intelligent dual and seqantial ignition its has 8 plugs , 2 plug per cilender 0n low rpm firstly one spark and then 2nd then 1st ,this is its sequence 1st,2nd,1st,2nd and so on....but on 5k+ rpm both plugs sparks in this way it burns every drop of fuel injected,
and about auto tranny idsi and vtec steermatic both are equipped with cvt (continuous variable transmittion) which do not have gears its changes gear ratio according to rpm and speed and give good average than simple manual and auto
principle of cvt is following

