I have Cultus 2005, it was giving me 7km/ltr with AC in the city. I went for tuning mechanic changed Fuel Filter, Spark Plugs and Gene (it was sort of rubber packing in the upper part of engine), adjusted RPM to 1000. Recently i had a oil change too i-e ZIC X7 FE used oil and air filter of Leppon.
After all this i got 7.5 km/ltr. ODO is 110,000km.
In my opinion this is not a good/ desired improvements.
Can anyone help me in this regard that how can I improve the mileage.
Mechanic was also claiming that after tuninig you will get 10 to 12 km/ltr.