Cars Q&A

I AM USING MARUTI SWIFT - VXI FOR THE PAST 2 YEARS MOSTLY IN LOCAL ( CITY ); AND A C IS USED INTERMITTENTLY; HOWEVER, I GET MILAGE OF ONLY 10 OR MAX 11, WHICH I SUPPOSE IS MUCH BELOW WHAT IS NORMALLY EXPECTED. WHAT, ACCORDING TO YOU, ARE SPECIFIC REASONS; AND WHAT RECTFICATION MEASURES SHOULD I TAKE FOR POSITIVE RESULTS? F Y I, I PURCHASED THIS CAR ( NEW ) IN MARCH 2007.