Friends i tell you few tricks to improve your carby mehran mileage more then 20km per liter.
1st of all try to drive your car on low rpm n speed, it dose not mean you drive 30-35 kmph, i mean if on highway if you drive 75kmph then drive it on 65kmph, when you start n run your car try to accelerate your car slowly but dont crawl, this why you get 2-3 km more avg per km,
2ndly get get your car properly tune up, like typerd setting, carburater cleaning, plugs changing or cleaning, use CDI n remove point system, change air filter some ppl say check if air filter is clean from inside then dont change but its wrong method rise air filter in between sun n your eye if you see lite crossing the filter is good it not then put new air filter doing this you can get upto 20% more mileage
3rd put your car fan on automatic, no meter its winter or summer, if your car have heat-up problem then if gasket problem change gasket or if radiator problem then change radiator, n never use direct or all time on fan, in morning start car n leave it for one mint then drive.
4. use stock tire size 145/70/12 or 155/70/12 but dont go more then 155/70/12, properly check your cars tire presser n check it when tyres are in cold if using 155 then tyre presser is 35 if 145 then 30. must check tyre presser once in month.