My Santro was doing ( 11.5 to 12 km per litre ) with AC last summer but this time around it is only averaging 10.2 km / litre. I have a clean airfilter, fuel filter, the car was recently tuned, the injector scan etc everything is fine as the mechanics say. I have also upgraded the efi power improvement software but my Santro's milage per litre is not improving any suggestions?? Santro users please post your car's milage