Well i have a mira 2012 130000 km driven, it giving me around 15/16 KM per liter then suddenly it drops to 12 then i change its catalytic converter which was broker and change the plugs too its radium plugs
still i am getting around 12 km per litter
i check RPM is is bit high around 1000 and mechanic say it will auto adjust in long route and i did a long route to obut it wont fixed
what can i do to increase its average
